64770645608 has 16 divisors (see below), whose sum is σ = 121462246500. Its totient is φ = 32380713216.

The previous prime is 64770645601. The next prime is 64770645619. The reversal of 64770645608 is 80654607746.

It can be written as a sum of positive squares in 2 ways, for example, as 63484849444 + 1285796164 = 251962^2 + 35858^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64770645608.

It is not an unprimeable number, because it can be changed into a prime (64770645601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516113 + ... + 629216.

Almost surely, 2^64770645608 is an apocalyptic number.

It is an amenable number.

64770645608 is a deficient number, since it is larger than the sum of its proper divisors (56691600892).

64770645608 is a wasteful number, since it uses less digits than its factorization.

64770645608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152404 (or 1152400 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 64770645608 in words is "sixty-four billion, seven hundred seventy million, six hundred forty-five thousand, six hundred eight".