13691515655 has 8 divisors (see below), whose sum is σ = 16488289584. Its totient is φ = 10914232000.

The previous prime is 13691515637. The next prime is 13691515703. The reversal of 13691515655 is 55651519631.

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

It is not a de Polignac number, because 13691515655 - 2¹⁶ = 13691450119 is a prime.

It is a super-3 number, since 3×13691515655³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

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, 4871021 + ... + 4873830.

It is an arithmetic number, because the mean of its divisors is an integer number (2061036198).

Almost surely, 2^13691515655 is an apocalyptic number.

13691515655 is a deficient number, since it is larger than the sum of its proper divisors (2796773929).

13691515655 is an equidigital number, since it uses as much as digits as its factorization.

13691515655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745137.

The product of its digits is 607500, while the sum is 47.

The spelling of 13691515655 in words is "thirteen billion, six hundred ninety-one million, five hundred fifteen thousand, six hundred fifty-five".