64772966438 has 16 divisors (see below), whose sum is σ = 98348206320. Its totient is φ = 31990375296.

The previous prime is 64772966437. The next prime is 64772966441. The reversal of 64772966438 is 83466927746.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64772966437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 945818 + ... + 1011986.

It is an arithmetic number, because the mean of its divisors is an integer number (6146762895).

Almost surely, 2^64772966438 is an apocalyptic number.

64772966438 is a deficient number, since it is larger than the sum of its proper divisors (33575239882).

64772966438 is a wasteful number, since it uses less digits than its factorization.

64772966438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72151.

The product of its digits is 73156608, while the sum is 62.

The spelling of 64772966438 in words is "sixty-four billion, seven hundred seventy-two million, nine hundred sixty-six thousand, four hundred thirty-eight".