63493657920 has 1120 divisors, whose sum is σ = 291564852480. Its totient is φ = 12726927360.

The previous prime is 63493657897. The next prime is 63493658009. The reversal of 63493657920 is 2975639436.

63493657920 is a `hidden beast` number, since 6 + 3 + 49 + 3 + 6 + 579 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (1120).

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 (13) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 57878812 + ... + 57879908.

Almost surely, 2^63493657920 is an apocalyptic number.

63493657920 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 63493657920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145782426240).

63493657920 is an abundant number, since it is smaller than the sum of its proper divisors (228071194560).

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

63493657920 is a wasteful number, since it uses less digits than its factorization.

63493657920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 63493657920 in words is "sixty-three billion, four hundred ninety-three million, six hundred fifty-seven thousand, nine hundred twenty".