78632855 has 16 divisors (see below), whose sum is σ = 109361664. Its totient is φ = 53158560.

The previous prime is 78632839. The next prime is 78632857. The reversal of 78632855 is 55823687.

It is not a de Polignac number, because 78632855 - 2⁴ = 78632839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78632857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13337 + ... + 18306.

It is an arithmetic number, because the mean of its divisors is an integer number (6835104).

Almost surely, 2^78632855 is an apocalyptic number.

78632855 is a deficient number, since it is larger than the sum of its proper divisors (30728809).

78632855 is a wasteful number, since it uses less digits than its factorization.

78632855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31726.

The product of its digits is 403200, while the sum is 44.

The square root of 78632855 is about 8867.5168452053. The cubic root of 78632855 is about 428.4183011940.

The spelling of 78632855 in words is "seventy-eight million, six hundred thirty-two thousand, eight hundred fifty-five".