79339800561 has 16 divisors (see below), whose sum is σ = 123471058944. Its totient is φ = 44372410704.

The previous prime is 79339800517. The next prime is 79339800569. The reversal of 79339800561 is 16500893397.

It is not a de Polignac number, because 79339800561 - 2⁹ = 79339800049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79339800569) 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, 40191415 + ... + 40193388.

It is an arithmetic number, because the mean of its divisors is an integer number (7716941184).

Almost surely, 2^79339800561 is an apocalyptic number.

It is an amenable number.

79339800561 is a deficient number, since it is larger than the sum of its proper divisors (44131258383).

79339800561 is a wasteful number, since it uses less digits than its factorization.

79339800561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80384860.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 79339800561 in words is "seventy-nine billion, three hundred thirty-nine million, eight hundred thousand, five hundred sixty-one".