78732815764 has 6 divisors (see below), whose sum is σ = 137782427594. Its totient is φ = 39366407880.

The previous prime is 78732815753. The next prime is 78732815767. The reversal of 78732815764 is 46751823787.

It can be written as a sum of positive squares in only one way, i.e., 70035388164 + 8697427600 = 264642^2 + 93260^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78732815699 and 78732815708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78732815767) 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 as a sum of consecutive naturals, namely, 9841601967 + ... + 9841601974.

Almost surely, 2^78732815764 is an apocalyptic number.

It is an amenable number.

78732815764 is a deficient number, since it is larger than the sum of its proper divisors (59049611830).

78732815764 is a wasteful number, since it uses less digits than its factorization.

78732815764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19683203945 (or 19683203943 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 58.

The spelling of 78732815764 in words is "seventy-eight billion, seven hundred thirty-two million, eight hundred fifteen thousand, seven hundred sixty-four".