64895657 has 4 divisors (see below), whose sum is σ = 65491140. Its totient is φ = 64300176.

The previous prime is 64895653. The next prime is 64895687. The reversal of 64895657 is 75659846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75659846 = 2 ⋅37829923.

It can be written as a sum of positive squares in 2 ways, for example, as 28847641 + 36048016 = 5371^2 + 6004^2 .

It is a cyclic number.

It is not a de Polignac number, because 64895657 - 2² = 64895653 is a prime.

It is a super-2 number, since 2×64895657² = 8422892594923298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64895653) 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, 297578 + ... + 297795.

It is an arithmetic number, because the mean of its divisors is an integer number (16372785).

Almost surely, 2^64895657 is an apocalyptic number.

It is an amenable number.

64895657 is a deficient number, since it is larger than the sum of its proper divisors (595483).

64895657 is a wasteful number, since it uses less digits than its factorization.

64895657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595482.

The product of its digits is 1814400, while the sum is 50.

The square root of 64895657 is about 8055.7840710883. The cubic root of 64895657 is about 401.8573146907.

The spelling of 64895657 in words is "sixty-four million, eight hundred ninety-five thousand, six hundred fifty-seven".