78738936786 has 16 divisors (see below), whose sum is σ = 174975415200. Its totient is φ = 26246312244.

The previous prime is 78738936767. The next prime is 78738936797. The reversal of 78738936786 is 68763983787.

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, 729064176 + ... + 729064283.

It is an arithmetic number, because the mean of its divisors is an integer number (10935963450).

Almost surely, 2^78738936786 is an apocalyptic number.

78738936786 is an abundant number, since it is smaller than the sum of its proper divisors (96236478414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78738936786 is a wasteful number, since it uses less digits than its factorization.

78738936786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458128470 (or 1458128464 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 72.

The spelling of 78738936786 in words is "seventy-eight billion, seven hundred thirty-eight million, nine hundred thirty-six thousand, seven hundred eighty-six".