15115655650550 has 96 divisors (see below), whose sum is σ = 34681339752192. Its totient is φ = 4773056446080.

The previous prime is 15115655650519. The next prime is 15115655650553. The reversal of 15115655650550 is 5505655651151.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15115655650553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1733924 + ... + 5765223.

It is an arithmetic number, because the mean of its divisors is an integer number (361263955752).

Almost surely, 2^{15115655650550} is an apocalyptic number.

15115655650550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15115655650550 is an abundant number, since it is smaller than the sum of its proper divisors (19565684101642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15115655650550 is a wasteful number, since it uses less digits than its factorization.

15115655650550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499622 (or 7499617 counting only the distinct ones).

The product of its (nonzero) digits is 2812500, while the sum is 50.

The spelling of 15115655650550 in words is "fifteen trillion, one hundred fifteen billion, six hundred fifty-five million, six hundred fifty thousand, five hundred fifty".