78102865732 has 6 divisors (see below), whose sum is σ = 136680015038. Its totient is φ = 39051432864.

The previous prime is 78102865727. The next prime is 78102865759. The reversal of 78102865732 is 23756820187.

It can be written as a sum of positive squares in only one way, i.e., 77872251136 + 230614596 = 279056^2 + 15186^2 .

It is a super-2 number, since 2×78102865732² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9762858213 + ... + 9762858220.

Almost surely, 2^78102865732 is an apocalyptic number.

It is an amenable number.

78102865732 is a deficient number, since it is larger than the sum of its proper divisors (58577149306).

78102865732 is a wasteful number, since it uses less digits than its factorization.

78102865732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19525716437 (or 19525716435 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 78102865732 in words is "seventy-eight billion, one hundred two million, eight hundred sixty-five thousand, seven hundred thirty-two".