11552521455 has 64 divisors (see below), whose sum is σ = 21715084800. Its totient is φ = 5811056640.

The previous prime is 11552521451. The next prime is 11552521457. The reversal of 11552521455 is 55412525511.

11552521455 is a `hidden beast` number, since 1 + 1 + 552 + 52 + 1 + 4 + 55 = 666.

It is not a de Polignac number, because 11552521455 - 2² = 11552521451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11552521451) 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, 572335 + ... + 592175.

It is an arithmetic number, because the mean of its divisors is an integer number (339298200).

Almost surely, 2^11552521455 is an apocalyptic number.

11552521455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11552521455 is a deficient number, since it is larger than the sum of its proper divisors (10162563345).

11552521455 is a wasteful number, since it uses less digits than its factorization.

11552521455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101 (or 20095 counting only the distinct ones).

The product of its digits is 50000, while the sum is 36.

The spelling of 11552521455 in words is "eleven billion, five hundred fifty-two million, five hundred twenty-one thousand, four hundred fifty-five".