77964719732 has 24 divisors (see below), whose sum is σ = 137325036576. Its totient is φ = 38729168928.

The previous prime is 77964719669. The next prime is 77964719747. The reversal of 77964719732 is 23791746977.

It is a congruent number.

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, 1911698 + ... + 1952054.

It is an arithmetic number, because the mean of its divisors is an integer number (5721876524).

Almost surely, 2^77964719732 is an apocalyptic number.

It is an amenable number.

77964719732 is a deficient number, since it is larger than the sum of its proper divisors (59360316844).

77964719732 is a wasteful number, since it uses less digits than its factorization.

77964719732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43487 (or 43485 counting only the distinct ones).

The product of its digits is 28005264, while the sum is 62.

The spelling of 77964719732 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred nineteen thousand, seven hundred thirty-two".