64732581516 has 24 divisors (see below), whose sum is σ = 153111770224. Its totient is φ = 21281944320.

The previous prime is 64732581499. The next prime is 64732581559. The reversal of 64732581516 is 61518523746.

64732581516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 36946945 + ... + 36948696.

Almost surely, 2^64732581516 is an apocalyptic number.

It is an amenable number.

64732581516 is an abundant number, since it is smaller than the sum of its proper divisors (88379188708).

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

64732581516 is a wasteful number, since it uses less digits than its factorization.

64732581516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73895721 (or 73895719 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The spelling of 64732581516 in words is "sixty-four billion, seven hundred thirty-two million, five hundred eighty-one thousand, five hundred sixteen".