64159657 has 4 divisors (see below), whose sum is σ = 64181376. Its totient is φ = 64137940.

The previous prime is 64159651. The next prime is 64159681. The reversal of 64159657 is 75695146.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75695146 = 2 ⋅37847573.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64159657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64159651) 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, 5569 + ... + 12622.

It is an arithmetic number, because the mean of its divisors is an integer number (16045344).

Almost surely, 2^64159657 is an apocalyptic number.

It is an amenable number.

64159657 is a deficient number, since it is larger than the sum of its proper divisors (21719).

64159657 is a wasteful number, since it uses less digits than its factorization.

64159657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21718.

The product of its digits is 226800, while the sum is 43.

The square root of 64159657 is about 8009.9723470184. The cubic root of 64159657 is about 400.3323425446.

The spelling of 64159657 in words is "sixty-four million, one hundred fifty-nine thousand, six hundred fifty-seven".