64899400608 has 120 divisors (see below), whose sum is σ = 218134157472. Its totient is φ = 18542680704.

The previous prime is 64899400607. The next prime is 64899400637. The reversal of 64899400608 is 80600499846.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64899400607) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1770310 + ... + 1806597.

Almost surely, 2^64899400608 is an apocalyptic number.

It is an amenable number.

64899400608 is an abundant number, since it is smaller than the sum of its proper divisors (153234756864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64899400608 is a wasteful number, since it uses less digits than its factorization.

64899400608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576936 (or 3576919 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 64899400608 in words is "sixty-four billion, eight hundred ninety-nine million, four hundred thousand, six hundred eight".