13657187638 has 8 divisors (see below), whose sum is σ = 20532026088. Its totient is φ = 6813178944.

The previous prime is 13657187629. The next prime is 13657187659. The reversal of 13657187638 is 83678175631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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, 7706331 + ... + 7708102.

It is an arithmetic number, because the mean of its divisors is an integer number (2566503261).

Almost surely, 2^13657187638 is an apocalyptic number.

13657187638 is a deficient number, since it is larger than the sum of its proper divisors (6874838450).

13657187638 is a wasteful number, since it uses less digits than its factorization.

13657187638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15414878.

The product of its digits is 5080320, while the sum is 55.

It can be divided in two parts, 13657 and 187638, that added together give a triangular number (201295 = T₆₃₄).

The spelling of 13657187638 in words is "thirteen billion, six hundred fifty-seven million, one hundred eighty-seven thousand, six hundred thirty-eight".