79687044547 has 4 divisors (see below), whose sum is σ = 86931321336. Its totient is φ = 72442767760.

The previous prime is 79687044533. The next prime is 79687044589. The reversal of 79687044547 is 74544078697.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-79687044547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79687044347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3622138378 + ... + 3622138399.

It is an arithmetic number, because the mean of its divisors is an integer number (21732830334).

Almost surely, 2^79687044547 is an apocalyptic number.

79687044547 is a deficient number, since it is larger than the sum of its proper divisors (7244276789).

79687044547 is a wasteful number, since it uses less digits than its factorization.

79687044547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244276788.

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 79687044547 in words is "seventy-nine billion, six hundred eighty-seven million, forty-four thousand, five hundred forty-seven".