13712356621 has 16 divisors (see below), whose sum is σ = 14997682224. Its totient is φ = 12484260864.

The previous prime is 13712356579. The next prime is 13712356627. The reversal of 13712356621 is 12665321731.

13712356621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1460080521 + 12252276100 = 38211^2 + 110690^2 .

It is a cyclic number.

It is not a de Polignac number, because 13712356621 - 2⁹ = 13712356109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13712356627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45811 + ... + 171823.

It is an arithmetic number, because the mean of its divisors is an integer number (937355139).

Almost surely, 2^13712356621 is an apocalyptic number.

It is an amenable number.

13712356621 is a deficient number, since it is larger than the sum of its proper divisors (1285325603).

13712356621 is a wasteful number, since it uses less digits than its factorization.

13712356621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126240.

The product of its digits is 45360, while the sum is 37.

The spelling of 13712356621 in words is "thirteen billion, seven hundred twelve million, three hundred fifty-six thousand, six hundred twenty-one".