64398063744 has 448 divisors, whose sum is σ = 231444936000. Its totient is φ = 17427695616.

The previous prime is 64398063731. The next prime is 64398063757. The reversal of 64398063744 is 44736089346.

64398063744 is a `hidden beast` number, since 6 + 439 + 80 + 63 + 74 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (64398063731) and next prime (64398063757).

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×64398063744² (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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 12407902 + ... + 12413090.

Almost surely, 2^64398063744 is an apocalyptic number.

64398063744 is a gapful number since it is divisible by the number (64) 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 64398063744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115722468000).

64398063744 is an abundant number, since it is smaller than the sum of its proper divisors (167046872256).

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

64398063744 is an equidigital number, since it uses as much as digits as its factorization.

64398063744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5247 (or 5220 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 64398063744 in words is "sixty-four billion, three hundred ninety-eight million, sixty-three thousand, seven hundred forty-four".