64499815370 has 16 divisors (see below), whose sum is σ = 116116386408. Its totient is φ = 25796210880.

The previous prime is 64499815357. The next prime is 64499815381. The reversal of 64499815370 is 7351899446.

64499815370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 58550932729 + 5948882641 = 241973^2 + 77129^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390941 + ... + 530880.

Almost surely, 2^64499815370 is an apocalyptic number.

64499815370 is a deficient number, since it is larger than the sum of its proper divisors (51616571038).

64499815370 is a wasteful number, since it uses less digits than its factorization.

64499815370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928825.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 64499815370 in words is "sixty-four billion, four hundred ninety-nine million, eight hundred fifteen thousand, three hundred seventy".