12255530533155 has 64 divisors (see below), whose sum is σ = 26815519825920. Its totient is φ = 5171564527488.

The previous prime is 12255530533153. The next prime is 12255530533159. The reversal of 12255530533155 is 55133503555221.

12255530533155 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 5 + 5 + 305 + 331 + 5 + 5 = 666.

It is not a de Polignac number, because 12255530533155 - 2¹ = 12255530533153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12255530533155.

It is not an unprimeable number, because it can be changed into a prime (12255530533153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 498788307 + ... + 498812876.

It is an arithmetic number, because the mean of its divisors is an integer number (418992497280).

Almost surely, 2^{12255530533155} is an apocalyptic number.

12255530533155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12255530533155 is an abundant number, since it is smaller than the sum of its proper divisors (14559989292765).

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

12255530533155 is a wasteful number, since it uses less digits than its factorization.

12255530533155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997601217 (or 997601211 counting only the distinct ones).

The product of its (nonzero) digits is 1687500, while the sum is 45.

The spelling of 12255530533155 in words is "twelve trillion, two hundred fifty-five billion, five hundred thirty million, five hundred thirty-three thousand, one hundred fifty-five".