79721599870 has 32 divisors (see below), whose sum is σ = 156916162656. Its totient is φ = 28920796800.

The previous prime is 79721599829. The next prime is 79721599873. The reversal of 79721599870 is 7899512797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79721599873) 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, 814429 + ... + 907048.

It is an arithmetic number, because the mean of its divisors is an integer number (4903630083).

Almost surely, 2^79721599870 is an apocalyptic number.

79721599870 is a deficient number, since it is larger than the sum of its proper divisors (77194562786).

79721599870 is a wasteful number, since it uses less digits than its factorization.

79721599870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721916.

The product of its (nonzero) digits is 20003760, while the sum is 64.

The spelling of 79721599870 in words is "seventy-nine billion, seven hundred twenty-one million, five hundred ninety-nine thousand, eight hundred seventy".