64772715042432 has 160 divisors (see below), whose sum is σ = 192768532791780. Its totient is φ = 21590234947584.

The previous prime is 64772715042407. The next prime is 64772715042433. The reversal of 64772715042432 is 23424051727746.

64772715042432 is a `hidden beast` number, since 6 + 4 + 7 + 72 + 71 + 50 + 424 + 32 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61877354158656 + 2895360883776 = 7866216^2 + 1701576^2 .

It is a super-2 number, since 2×64772715042432² (a number of 28 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (64772715042433) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 423072648 + ... + 423225720.

Almost surely, 2^{64772715042432} is an apocalyptic number.

It is an amenable number.

64772715042432 is an abundant number, since it is smaller than the sum of its proper divisors (127995817749348).

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

64772715042432 is a wasteful number, since it uses less digits than its factorization.

64772715042432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193912 (or 193891 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 54.

The spelling of 64772715042432 in words is "sixty-four trillion, seven hundred seventy-two billion, seven hundred fifteen million, forty-two thousand, four hundred thirty-two".