15500505105 has 24 divisors (see below), whose sum is σ = 26870445888. Its totient is φ = 8266042656.

The previous prime is 15500505077. The next prime is 15500505113. The reversal of 15500505105 is 50150500551.

15500505105 is a `hidden beast` number, since 1 + 5 + 50 + 0 + 505 + 105 = 666.

It is not a de Polignac number, because 15500505105 - 2⁵ = 15500505073 is a prime.

It is a super-2 number, since 2×15500505105² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 764124 + ... + 784146.

It is an arithmetic number, because the mean of its divisors is an integer number (1119601912).

Almost surely, 2^15500505105 is an apocalyptic number.

15500505105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15500505105 is a deficient number, since it is larger than the sum of its proper divisors (11369940783).

15500505105 is a wasteful number, since it uses less digits than its factorization.

15500505105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37237 (or 37234 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The spelling of 15500505105 in words is "fifteen billion, five hundred million, five hundred five thousand, one hundred five".