79401555 has 12 divisors (see below), whose sum is σ = 137629440. Its totient is φ = 42347472.

The previous prime is 79401533. The next prime is 79401587. The reversal of 79401555 is 55510497.

79401555 = 1186² + 1187² + ... + 1239².

It is not a de Polignac number, because 79401555 - 2⁸ = 79401299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 882195 + ... + 882284.

It is an arithmetic number, because the mean of its divisors is an integer number (11469120).

Almost surely, 2^79401555 is an apocalyptic number.

79401555 is a deficient number, since it is larger than the sum of its proper divisors (58227885).

79401555 is a wasteful number, since it uses less digits than its factorization.

79401555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764490 (or 1764487 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 79401555 is about 8910.7550185155. The cubic root of 79401555 is about 429.8098221573.

The spelling of 79401555 in words is "seventy-nine million, four hundred one thousand, five hundred fifty-five".