15238867655 has 24 divisors (see below), whose sum is σ = 20793326400. Its totient is φ = 10700634560.

The previous prime is 15238867627. The next prime is 15238867697. The reversal of 15238867655 is 55676883251.

It is a happy number.

It is not a de Polignac number, because 15238867655 - 2²⁴ = 15222090439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15238867655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416735 + ... + 451824.

It is an arithmetic number, because the mean of its divisors is an integer number (866388600).

Almost surely, 2^15238867655 is an apocalyptic number.

15238867655 is a deficient number, since it is larger than the sum of its proper divisors (5554458745).

15238867655 is a wasteful number, since it uses less digits than its factorization.

15238867655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868615 (or 868604 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 56.

The spelling of 15238867655 in words is "fifteen billion, two hundred thirty-eight million, eight hundred sixty-seven thousand, six hundred fifty-five".