79555557 has 8 divisors (see below), whose sum is σ = 106348320. Its totient is φ = 52899920.

The previous prime is 79555549. The next prime is 79555559. The reversal of 79555557 is 75555597.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79555557 - 2³ = 79555549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79555559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32919 + ... + 35252.

It is an arithmetic number, because the mean of its divisors is an integer number (13293540).

Almost surely, 2^79555557 is an apocalyptic number.

It is an amenable number.

79555557 is a deficient number, since it is larger than the sum of its proper divisors (26792763).

79555557 is a wasteful number, since it uses less digits than its factorization.

79555557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68563.

The product of its digits is 1378125, while the sum is 48.

The square root of 79555557 is about 8919.3921878119. The cubic root of 79555557 is about 430.0875195932.

The spelling of 79555557 in words is "seventy-nine million, five hundred fifty-five thousand, five hundred fifty-seven".