64808457 has 32 divisors (see below), whose sum is σ = 104079360. Its totient is φ = 35069760.

The previous prime is 64808399. The next prime is 64808467. The reversal of 64808457 is 75480846.

It is not a de Polignac number, because 64808457 - 2¹⁴ = 64792073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64808467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52032 + ... + 53262.

It is an arithmetic number, because the mean of its divisors is an integer number (3252480).

Almost surely, 2^64808457 is an apocalyptic number.

It is an amenable number.

64808457 is a deficient number, since it is larger than the sum of its proper divisors (39270903).

64808457 is a wasteful number, since it uses less digits than its factorization.

64808457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 64808457 is about 8050.3699914973. The cubic root of 64808457 is about 401.6772427289.

The spelling of 64808457 in words is "sixty-four million, eight hundred eight thousand, four hundred fifty-seven".