22461155172 has 120 divisors (see below), whose sum is σ = 61679705472. Its totient is φ = 7113744000.

The previous prime is 22461155137. The next prime is 22461155177. The reversal of 22461155172 is 27155116422.

22461155172 is a `hidden beast` number, since 2 + 24 + 6 + 11 + 551 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22461155177) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1115272 + ... + 1135232.

Almost surely, 2^22461155172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22461155172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30839852736).

22461155172 is an abundant number, since it is smaller than the sum of its proper divisors (39218550300).

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

22461155172 is a wasteful number, since it uses less digits than its factorization.

22461155172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20151 (or 20140 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The spelling of 22461155172 in words is "twenty-two billion, four hundred sixty-one million, one hundred fifty-five thousand, one hundred seventy-two".