64157257537 has 8 divisors (see below), whose sum is σ = 64848534080. Its totient is φ = 63467848080.

The previous prime is 64157257531. The next prime is 64157257553. The reversal of 64157257537 is 73575275146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64157257537 - 2²³ = 64148868929 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 397623 + ... + 535180.

It is an arithmetic number, because the mean of its divisors is an integer number (8106066760).

Almost surely, 2^64157257537 is an apocalyptic number.

It is an amenable number.

64157257537 is a deficient number, since it is larger than the sum of its proper divisors (691276543).

64157257537 is a wasteful number, since it uses less digits than its factorization.

64157257537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933543.

The product of its digits is 6174000, while the sum is 52.

The spelling of 64157257537 in words is "sixty-four billion, one hundred fifty-seven million, two hundred fifty-seven thousand, five hundred thirty-seven".