63799183440 has 360 divisors, whose sum is σ = 234530176608. Its totient is φ = 16115915520.

The previous prime is 63799183429. The next prime is 63799183451. The reversal of 63799183440 is 4438199736.

It is a happy number.

63799183440 is a `hidden beast` number, since 6 + 37 + 9 + 91 + 83 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (63799183429) and next prime (63799183451).

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×63799183440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7013295 + ... + 7022385.

Almost surely, 2^63799183440 is an apocalyptic number.

63799183440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63799183440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117265088304).

63799183440 is an abundant number, since it is smaller than the sum of its proper divisors (170730993168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63799183440 is a wasteful number, since it uses less digits than its factorization.

63799183440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157 (or 9120 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

It can be divided in two parts, 6379 and 9183440, that added together give a palindrome (9189819).

The spelling of 63799183440 in words is "sixty-three billion, seven hundred ninety-nine million, one hundred eighty-three thousand, four hundred forty".