64457825 has 12 divisors (see below), whose sum is σ = 80411520. Its totient is φ = 51254160.

The previous prime is 64457803. The next prime is 64457831. The reversal of 64457825 is 52875446.

It is not a de Polignac number, because 64457825 - 2¹⁰ = 64456801 is a prime.

It is a super-2 number, since 2×64457825² = 8309622407461250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3545 + ... + 11894.

It is an arithmetic number, because the mean of its divisors is an integer number (6700960).

Almost surely, 2^64457825 is an apocalyptic number.

It is an amenable number.

64457825 is a deficient number, since it is larger than the sum of its proper divisors (15953695).

64457825 is a wasteful number, since it uses less digits than its factorization.

64457825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15616 (or 15611 counting only the distinct ones).

The product of its digits is 268800, while the sum is 41.

The square root of 64457825 is about 8028.5630719326. The cubic root of 64457825 is about 400.9515367331.

The spelling of 64457825 in words is "sixty-four million, four hundred fifty-seven thousand, eight hundred twenty-five".