78257772772120 has 96 divisors (see below), whose sum is σ = 189681373939680. Its totient is φ = 29046795223040.

The previous prime is 78257772772117. The next prime is 78257772772147. The reversal of 78257772772120 is 2127727775287.

It is a super-2 number, since 2×78257772772120² (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 23 ways as a sum of consecutive naturals, for example, 46853209 + ... + 48494728.

It is an arithmetic number, because the mean of its divisors is an integer number (1975847645205).

Almost surely, 2^{78257772772120} is an apocalyptic number.

It is an amenable number.

78257772772120 is an abundant number, since it is smaller than the sum of its proper divisors (111423601167560).

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

78257772772120 is a wasteful number, since it uses less digits than its factorization.

78257772772120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95348053 (or 95348032 counting only the distinct ones).

The product of its (nonzero) digits is 75295360, while the sum is 64.

The spelling of 78257772772120 in words is "seventy-eight trillion, two hundred fifty-seven billion, seven hundred seventy-two million, seven hundred seventy-two thousand, one hundred twenty".