78802855 has 4 divisors (see below), whose sum is σ = 94563432. Its totient is φ = 63042280.

The previous prime is 78802847. The next prime is 78802873. The reversal of 78802855 is 55820887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55820887 = 563 ⋅99149.

It is not a de Polignac number, because 78802855 - 2³ = 78802847 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 7880281 + ... + 7880290.

It is an arithmetic number, because the mean of its divisors is an integer number (23640858).

Almost surely, 2^78802855 is an apocalyptic number.

78802855 is a deficient number, since it is larger than the sum of its proper divisors (15760577).

78802855 is a wasteful number, since it uses less digits than its factorization.

78802855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15760576.

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 78802855 is about 8877.0972169961. The cubic root of 78802855 is about 428.7268180708.

The spelling of 78802855 in words is "seventy-eight million, eight hundred two thousand, eight hundred fifty-five".