78726166320 has 240 divisors, whose sum is σ = 260078139648. Its totient is φ = 19695759360.

The previous prime is 78726166319. The next prime is 78726166361. The reversal of 78726166320 is 2366162787.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 78726166320.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24066285 + ... + 24069555.

Almost surely, 2^78726166320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78726166320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130039069824).

78726166320 is an abundant number, since it is smaller than the sum of its proper divisors (181351973328).

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

78726166320 is a wasteful number, since it uses less digits than its factorization.

78726166320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668 (or 3645 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 78726166320 in words is "seventy-eight billion, seven hundred twenty-six million, one hundred sixty-six thousand, three hundred twenty".