13572619721 has 16 divisors (see below), whose sum is σ = 14046849024. Its totient is φ = 13107064464.

The previous prime is 13572619693. The next prime is 13572619747. The reversal of 13572619721 is 12791627531.

It is not a de Polignac number, because 13572619721 - 2¹⁴ = 13572603337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13572619751) 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, 1365050 + ... + 1374956.

It is an arithmetic number, because the mean of its divisors is an integer number (877928064).

Almost surely, 2^13572619721 is an apocalyptic number.

It is an amenable number.

13572619721 is a deficient number, since it is larger than the sum of its proper divisors (474229303).

13572619721 is a wasteful number, since it uses less digits than its factorization.

13572619721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10340.

The product of its digits is 158760, while the sum is 44.

The spelling of 13572619721 in words is "thirteen billion, five hundred seventy-two million, six hundred nineteen thousand, seven hundred twenty-one".