79445553 has 16 divisors (see below), whose sum is σ = 118246656. Its totient is φ = 47028240.

The previous prime is 79445551. The next prime is 79445563. The reversal of 79445553 is 35554497.

It is not a de Polignac number, because 79445553 - 2¹ = 79445551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79445551) 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, 26575 + ... + 29412.

It is an arithmetic number, because the mean of its divisors is an integer number (7390416).

Almost surely, 2^79445553 is an apocalyptic number.

It is an amenable number.

79445553 is a deficient number, since it is larger than the sum of its proper divisors (38801103).

79445553 is a wasteful number, since it uses less digits than its factorization.

79445553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56044.

The product of its digits is 378000, while the sum is 42.

The square root of 79445553 is about 8913.2234909712. The cubic root of 79445553 is about 429.8891962564.

The spelling of 79445553 in words is "seventy-nine million, four hundred forty-five thousand, five hundred fifty-three".