64872057 has 16 divisors (see below), whose sum is σ = 90091008. Its totient is φ = 41475840.

The previous prime is 64872047. The next prime is 64872077. The reversal of 64872057 is 75027846.

It is not a de Polignac number, because 64872057 - 2¹⁰ = 64871033 is a prime.

It is a super-2 number, since 2×64872057² = 8416767558822498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64872007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7423 + ... + 13595.

It is an arithmetic number, because the mean of its divisors is an integer number (5630688).

Almost surely, 2^64872057 is an apocalyptic number.

It is an amenable number.

64872057 is a deficient number, since it is larger than the sum of its proper divisors (25218951).

64872057 is a wasteful number, since it uses less digits than its factorization.

64872057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6320.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 64872057 is about 8054.3191518588. The cubic root of 64872057 is about 401.8085955471.

The spelling of 64872057 in words is "sixty-four million, eight hundred seventy-two thousand, fifty-seven".