15501005500 has 96 divisors (see below), whose sum is σ = 34825190400. Its totient is φ = 6024110400.

The previous prime is 15501005477. The next prime is 15501005551. The reversal of 15501005500 is 550010551.

It is a super-2 number, since 2×15501005500² (a number of 21 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 31 ways as a sum of consecutive naturals, for example, 4276689 + ... + 4280311.

It is an arithmetic number, because the mean of its divisors is an integer number (362762400).

Almost surely, 2^15501005500 is an apocalyptic number.

15501005500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15501005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17412595200).

15501005500 is an abundant number, since it is smaller than the sum of its proper divisors (19324184900).

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

15501005500 is a wasteful number, since it uses less digits than its factorization.

15501005500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 22.

The spelling of 15501005500 in words is "fifteen billion, five hundred one million, five thousand, five hundred".