78220056375 has 128 divisors (see below), whose sum is σ = 149879808000. Its totient is φ = 40210992000.

The previous prime is 78220056361. The next prime is 78220056389. The reversal of 78220056375 is 57365002287.

78220056375 is a `hidden beast` number, since 7 + 8 + 2 + 2 + 0 + 0 + 5 + 637 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (78220056361) and next prime (78220056389).

It is not a de Polignac number, because 78220056375 - 2⁹ = 78220055863 is a prime.

It is a super-2 number, since 2×78220056375² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 78220056375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28979776 + ... + 28982474.

It is an arithmetic number, because the mean of its divisors is an integer number (1170936000).

Almost surely, 2^78220056375 is an apocalyptic number.

78220056375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78220056375 is a deficient number, since it is larger than the sum of its proper divisors (71659751625).

78220056375 is a wasteful number, since it uses less digits than its factorization.

78220056375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031 (or 3015 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 78220056375 in words is "seventy-eight billion, two hundred twenty million, fifty-six thousand, three hundred seventy-five".