78216325405204 has 24 divisors (see below), whose sum is σ = 156432846926720. Its totient is φ = 33521240291616.

The previous prime is 78216325405199. The next prime is 78216325405243. The reversal of 78216325405204 is 40250452361287.

It is a super-2 number, since 2×78216325405204² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 33270817 + ... + 35544055.

Almost surely, 2^{78216325405204} is an apocalyptic number.

It is an amenable number.

78216325405204 is an abundant number, since it is smaller than the sum of its proper divisors (78216521521516).

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

78216325405204 is a wasteful number, since it uses less digits than its factorization.

78216325405204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3502087 (or 3502085 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 49.

The spelling of 78216325405204 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred twenty-five million, four hundred five thousand, two hundred four".