64157137 has 4 divisors (see below), whose sum is σ = 69989616. Its totient is φ = 58324660.

The previous prime is 64157113. The next prime is 64157141. The reversal of 64157137 is 73175146.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64157137 is a prime.

It is a super-2 number, since 2×64157137² = 8232276456073538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64151137) 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, 2916223 + ... + 2916244.

It is an arithmetic number, because the mean of its divisors is an integer number (17497404).

Almost surely, 2^64157137 is an apocalyptic number.

It is an amenable number.

64157137 is a deficient number, since it is larger than the sum of its proper divisors (5832479).

64157137 is a wasteful number, since it uses less digits than its factorization.

64157137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832478.

The product of its digits is 17640, while the sum is 34.

The square root of 64157137 is about 8009.8150415599. The cubic root of 64157137 is about 400.3271011891.

Subtracting 64157137 from its reverse (73175146), we obtain a square (9018009 = 3003²).

The spelling of 64157137 in words is "sixty-four million, one hundred fifty-seven thousand, one hundred thirty-seven".