64257536 has 40 divisors (see below), whose sum is σ = 146739120. Its totient is φ = 27537408.

The previous prime is 64257527. The next prime is 64257539. The reversal of 64257536 is 63575246.

It is a self number, because there is not a number n which added to its sum of digits gives 64257536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64257539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (3668478).

Almost surely, 2^64257536 is an apocalyptic number.

It is an amenable number.

64257536 is an abundant number, since it is smaller than the sum of its proper divisors (82481584).

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

64257536 is an equidigital number, since it uses as much as digits as its factorization.

64257536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17954 (or 17938 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 64257536 is about 8016.0798399218. The cubic root of 64257536 is about 400.5358152678.

The spelling of 64257536 in words is "sixty-four million, two hundred fifty-seven thousand, five hundred thirty-six".