64157257536 has 112 divisors (see below), whose sum is σ = 174466544640. Its totient is φ = 20799567360.

The previous prime is 64157257531. The next prime is 64157257553. The reversal of 64157257536 is 63575275146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64157257531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984691 + ... + 1047821.

Almost surely, 2^64157257536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64157257536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87233272320).

64157257536 is an abundant number, since it is smaller than the sum of its proper divisors (110309287104).

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

64157257536 is a wasteful number, since it uses less digits than its factorization.

64157257536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63292 (or 63282 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 51.

The spelling of 64157257536 in words is "sixty-four billion, one hundred fifty-seven million, two hundred fifty-seven thousand, five hundred thirty-six".