78164845 has 16 divisors (see below), whose sum is σ = 102799872. Its totient is φ = 56583360.

The previous prime is 78164839. The next prime is 78164887. The reversal of 78164845 is 54846187.

It is not a de Polignac number, because 78164845 - 2³ = 78164837 is a prime.

It is a super-2 number, since 2×78164845² = 12219485987748050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9079 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (6424992).

Almost surely, 2^78164845 is an apocalyptic number.

It is an amenable number.

78164845 is a deficient number, since it is larger than the sum of its proper divisors (24635027).

78164845 is a wasteful number, since it uses less digits than its factorization.

78164845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612.

The product of its digits is 215040, while the sum is 43.

The square root of 78164845 is about 8841.0884510902. The cubic root of 78164845 is about 427.5666505750.

The spelling of 78164845 in words is "seventy-eight million, one hundred sixty-four thousand, eight hundred forty-five".