64772716508 has 48 divisors (see below), whose sum is σ = 118317416448. Its totient is φ = 30991680000.

The previous prime is 64772716507. The next prime is 64772716511. The reversal of 64772716508 is 80561727746.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64772716508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64772716507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25389833 + ... + 25392383.

It is an arithmetic number, because the mean of its divisors is an integer number (2464946176).

Almost surely, 2^64772716508 is an apocalyptic number.

It is an amenable number.

64772716508 is a deficient number, since it is larger than the sum of its proper divisors (53544699940).

64772716508 is a wasteful number, since it uses less digits than its factorization.

64772716508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794 (or 4792 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 64772716508 in words is "sixty-four billion, seven hundred seventy-two million, seven hundred sixteen thousand, five hundred eight".