78709929717572 has 12 divisors (see below), whose sum is σ = 140945688099216. Its totient is φ = 38439733117800.

The previous prime is 78709929717533. The next prime is 78709929717583. The reversal of 78709929717572 is 27571792990787.

It is a super-2 number, since 2×78709929717572² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228807935054 + ... + 228807935397.

It is an arithmetic number, because the mean of its divisors is an integer number (11745474008268).

Almost surely, 2^{78709929717572} is an apocalyptic number.

It is an amenable number.

78709929717572 is a deficient number, since it is larger than the sum of its proper divisors (62235758381644).

78709929717572 is a wasteful number, since it uses less digits than its factorization.

78709929717572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457615870498 (or 457615870496 counting only the distinct ones).

The product of its (nonzero) digits is 1960368480, while the sum is 80.

The spelling of 78709929717572 in words is "seventy-eight trillion, seven hundred nine billion, nine hundred twenty-nine million, seven hundred seventeen thousand, five hundred seventy-two".