15105555105500 has 24 divisors (see below), whose sum is σ = 32990532351504. Its totient is φ = 6042222042000.

The previous prime is 15105555105497. The next prime is 15105555105523. The reversal of 15105555105500 is 550155550151.

It is a super-2 number, since 2×15105555105500² (a number of 27 digits) contains 22 as substring.

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, 15105554606 + ... + 15105555605.

It is an arithmetic number, because the mean of its divisors is an integer number (1374605514646).

Almost surely, 2^{15105555105500} is an apocalyptic number.

15105555105500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15105555105500 is an abundant number, since it is smaller than the sum of its proper divisors (17884977246004).

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

15105555105500 is a wasteful number, since it uses less digits than its factorization.

15105555105500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30211110230 (or 30211110218 counting only the distinct ones).

The product of its (nonzero) digits is 78125, while the sum is 38.

The spelling of 15105555105500 in words is "fifteen trillion, one hundred five billion, five hundred fifty-five million, one hundred five thousand, five hundred".