79519561 has 16 divisors (see below), whose sum is σ = 88397568. Its totient is φ = 70930000.

The previous prime is 79519547. The next prime is 79519567. The reversal of 79519561 is 16591597.

It is a cyclic number.

It is not a de Polignac number, because 79519561 - 2⁵ = 79519529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79519567) 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, 228990 + ... + 229336.

It is an arithmetic number, because the mean of its divisors is an integer number (5524848).

Almost surely, 2^79519561 is an apocalyptic number.

It is an amenable number.

79519561 is a deficient number, since it is larger than the sum of its proper divisors (8878007).

79519561 is a wasteful number, since it uses less digits than its factorization.

79519561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 85050, while the sum is 43.

The square root of 79519561 is about 8917.3741090077. The cubic root of 79519561 is about 430.0226434804.

The spelling of 79519561 in words is "seventy-nine million, five hundred nineteen thousand, five hundred sixty-one".