78538400217104 has 20 divisors (see below), whose sum is σ = 152168929612800. Its totient is φ = 39268999026720.

The previous prime is 78538400217049. The next prime is 78538400217191. The reversal of 78538400217104 is 40171200483587.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9319904 + ... + 15618495.

It is an arithmetic number, because the mean of its divisors is an integer number (7608446480640).

Almost surely, 2^{78538400217104} is an apocalyptic number.

It is an amenable number.

78538400217104 is a deficient number, since it is larger than the sum of its proper divisors (73630529395696).

78538400217104 is a wasteful number, since it uses less digits than its factorization.

78538400217104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25135238 (or 25135232 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 78538400217104 in words is "seventy-eight trillion, five hundred thirty-eight billion, four hundred million, two hundred seventeen thousand, one hundred four".