78540822928 has 40 divisors (see below), whose sum is σ = 158264017280. Its totient is φ = 37725367680.

The previous prime is 78540822889. The next prime is 78540822959. The reversal of 78540822928 is 82922804587.

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, 792918 + ... + 886453.

It is an arithmetic number, because the mean of its divisors is an integer number (3956600432).

Almost surely, 2^78540822928 is an apocalyptic number.

It is an amenable number.

78540822928 is an abundant number, since it is smaller than the sum of its proper divisors (79723194352).

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

78540822928 is a wasteful number, since it uses less digits than its factorization.

78540822928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679495 (or 1679489 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 78540822928 in words is "seventy-eight billion, five hundred forty million, eight hundred twenty-two thousand, nine hundred twenty-eight".