64975980776 has 24 divisors (see below), whose sum is σ = 141720571170. Its totient is φ = 27846848736.

The previous prime is 64975980767. The next prime is 64975980821. The reversal of 64975980776 is 67708957946.

64975980776 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 only one way, i.e., 34717378276 + 30258602500 = 186326^2 + 173950^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82877135 + ... + 82877918.

Almost surely, 2^64975980776 is an apocalyptic number.

It is an amenable number.

64975980776 is an abundant number, since it is smaller than the sum of its proper divisors (76744590394).

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

64975980776 is a wasteful number, since it uses less digits than its factorization.

64975980776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165755073 (or 165755062 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 68.

The spelling of 64975980776 in words is "sixty-four billion, nine hundred seventy-five million, nine hundred eighty thousand, seven hundred seventy-six".