64315870 has 16 divisors (see below), whose sum is σ = 117164880. Its totient is φ = 25416064.

The previous prime is 64315859. The next prime is 64315873. The reversal of 64315870 is 7851346.

It is a super-2 number, since 2×64315870² = 8273062267713800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64315873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37915 + ... + 39574.

It is an arithmetic number, because the mean of its divisors is an integer number (7322805).

Almost surely, 2^64315870 is an apocalyptic number.

64315870 is a deficient number, since it is larger than the sum of its proper divisors (52849010).

64315870 is a wasteful number, since it uses less digits than its factorization.

64315870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77579.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 64315870 is about 8019.7175760746. The cubic root of 64315870 is about 400.6569828431.

The spelling of 64315870 in words is "sixty-four million, three hundred fifteen thousand, eight hundred seventy".