12515517530055 has 12 divisors (see below), whose sum is σ = 21693563718840. Its totient is φ = 6674942682672.

The previous prime is 12515517530053. The next prime is 12515517530077. The reversal of 12515517530055 is 55003571551521.

12515517530055 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 55 + 17 + 530 + 0 + 55 = 666.

It is not a de Polignac number, because 12515517530055 - 2¹ = 12515517530053 is a prime.

It is a super-2 number, since 2×12515517530055² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 278122611779 = 12515517530055 / (1 + 2 + 5 + 1 + 5 + 5 + 1 + 7 + 5 + 3 + 0 + 0 + 5 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515517530053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139061305845 + ... + 139061305934.

It is an arithmetic number, because the mean of its divisors is an integer number (1807796976570).

Almost surely, 2^{12515517530055} is an apocalyptic number.

12515517530055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12515517530055 is a deficient number, since it is larger than the sum of its proper divisors (9178046188785).

12515517530055 is a wasteful number, since it uses less digits than its factorization.

12515517530055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278122611790 (or 278122611787 counting only the distinct ones).

The product of its (nonzero) digits is 656250, while the sum is 45.

The spelling of 12515517530055 in words is "twelve trillion, five hundred fifteen billion, five hundred seventeen million, five hundred thirty thousand, fifty-five".