22538601855 has 48 divisors (see below), whose sum is σ = 48706804224. Its totient is φ = 9366690240.

The previous prime is 22538601851. The next prime is 22538601871. The reversal of 22538601855 is 55810683522.

22538601855 is a `hidden beast` number, since 2 + 2 + 5 + 38 + 601 + 8 + 5 + 5 = 666.

It is not a de Polignac number, because 22538601855 - 2² = 22538601851 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 22538601855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22538601851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3248859 + ... + 3255788.

It is an arithmetic number, because the mean of its divisors is an integer number (1014725088).

Almost surely, 2^22538601855 is an apocalyptic number.

22538601855 is an abundant number, since it is smaller than the sum of its proper divisors (26168202369).

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

22538601855 is a wasteful number, since it uses less digits than its factorization.

22538601855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6504676 (or 6504673 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 22538601855 in words is "twenty-two billion, five hundred thirty-eight million, six hundred one thousand, eight hundred fifty-five".