13718639636 has 24 divisors (see below), whose sum is σ = 25858169064. Its totient is φ = 6330746880.

The previous prime is 13718639449. The next prime is 13718639659. The reversal of 13718639636 is 63693681731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 587771536 + 13130868100 = 24244^2 + 114590^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440516 + ... + 470628.

It is an arithmetic number, because the mean of its divisors is an integer number (1077423711).

Almost surely, 2^13718639636 is an apocalyptic number.

It is an amenable number.

13718639636 is a deficient number, since it is larger than the sum of its proper divisors (12139529428).

13718639636 is a wasteful number, since it uses less digits than its factorization.

13718639636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38891 (or 38889 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 53.

The spelling of 13718639636 in words is "thirteen billion, seven hundred eighteen million, six hundred thirty-nine thousand, six hundred thirty-six".