13639263788 has 12 divisors (see below), whose sum is σ = 23879228520. Its totient is φ = 6816627072.

The previous prime is 13639263763. The next prime is 13639263793. The reversal of 13639263788 is 88736293631.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740978 + ... + 759161.

It is an arithmetic number, because the mean of its divisors is an integer number (1989935710).

Almost surely, 2^13639263788 is an apocalyptic number.

It is an amenable number.

13639263788 is a deficient number, since it is larger than the sum of its proper divisors (10239964732).

13639263788 is a wasteful number, since it uses less digits than its factorization.

13639263788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502416 (or 1502414 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 56.

The spelling of 13639263788 in words is "thirteen billion, six hundred thirty-nine million, two hundred sixty-three thousand, seven hundred eighty-eight".