12550520278555 has 16 divisors (see below), whose sum is σ = 17217423671040. Its totient is φ = 8603430260832.

The previous prime is 12550520278553. The next prime is 12550520278559. The reversal of 12550520278555 is 55587202505521.

12550520278555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12550520278555 - 2¹ = 12550520278553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12550520278553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54900709 + ... + 55128838.

It is an arithmetic number, because the mean of its divisors is an integer number (1076088979440).

Almost surely, 2^{12550520278555} is an apocalyptic number.

12550520278555 is a deficient number, since it is larger than the sum of its proper divisors (4666903392485).

12550520278555 is a wasteful number, since it uses less digits than its factorization.

12550520278555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110032818.

The product of its (nonzero) digits is 7000000, while the sum is 52.

The spelling of 12550520278555 in words is "twelve trillion, five hundred fifty billion, five hundred twenty million, two hundred seventy-eight thousand, five hundred fifty-five".