78218425775854 has 128 divisors (see below), whose sum is σ = 152299112232960. Its totient is φ = 29309737766400.

The previous prime is 78218425775807. The next prime is 78218425775863. The reversal of 78218425775854 is 45857752481287.

It is a super-2 number, since 2×78218425775854² (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 63 ways as a sum of consecutive naturals, for example, 32740552 + ... + 35048260.

It is an arithmetic number, because the mean of its divisors is an integer number (1189836814320).

Almost surely, 2^{78218425775854} is an apocalyptic number.

78218425775854 is a deficient number, since it is larger than the sum of its proper divisors (74080686457106).

78218425775854 is a wasteful number, since it uses less digits than its factorization.

78218425775854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307906.

The product of its digits is 1404928000, while the sum is 73.

The spelling of 78218425775854 in words is "seventy-eight trillion, two hundred eighteen billion, four hundred twenty-five million, seven hundred seventy-five thousand, eight hundred fifty-four".