64161657 has 12 divisors (see below), whose sum is σ = 105917760. Its totient is φ = 36663768.

The previous prime is 64161653. The next prime is 64161707. The reversal of 64161657 is 75616146.

64161657 is a `hidden beast` number, since 641 + 6 + 1 + 6 + 5 + 7 = 666.

It is not a de Polignac number, because 64161657 - 2² = 64161653 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64161653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509157 + ... + 509282.

It is an arithmetic number, because the mean of its divisors is an integer number (8826480).

Almost surely, 2^64161657 is an apocalyptic number.

It is an amenable number.

64161657 is a deficient number, since it is larger than the sum of its proper divisors (41756103).

64161657 is a wasteful number, since it uses less digits than its factorization.

64161657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018452 (or 1018449 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 64161657 is about 8010.0971904216. The cubic root of 64161657 is about 400.3365022529.

The spelling of 64161657 in words is "sixty-four million, one hundred sixty-one thousand, six hundred fifty-seven".