78406169800 has 96 divisors (see below), whose sum is σ = 210677587200. Its totient is φ = 26580026880.

The previous prime is 78406169797. The next prime is 78406169801. The reversal of 78406169800 is 896160487.

It is a super-2 number, since 2×78406169800² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78406169801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190032 + ... + 439231.

It is an arithmetic number, because the mean of its divisors is an integer number (2194558200).

Almost surely, 2^78406169800 is an apocalyptic number.

78406169800 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78406169800 is an abundant number, since it is smaller than the sum of its proper divisors (132271417400).

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

78406169800 is a wasteful number, since it uses less digits than its factorization.

78406169800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629375 (or 629366 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 78406169800 in words is "seventy-eight billion, four hundred six million, one hundred sixty-nine thousand, eight hundred".