13915525661 has 8 divisors (see below), whose sum is σ = 14757447744. Its totient is φ = 13076199360.

The previous prime is 13915525651. The next prime is 13915525699. The reversal of 13915525661 is 16652551931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13915525661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13915525601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637895 + ... + 659348.

It is an arithmetic number, because the mean of its divisors is an integer number (1844680968).

Almost surely, 2^13915525661 is an apocalyptic number.

It is an amenable number.

13915525661 is a deficient number, since it is larger than the sum of its proper divisors (841922083).

13915525661 is a wasteful number, since it uses less digits than its factorization.

13915525661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297891.

The product of its digits is 243000, while the sum is 44.

The spelling of 13915525661 in words is "thirteen billion, nine hundred fifteen million, five hundred twenty-five thousand, six hundred sixty-one".