22546144272 has 80 divisors (see below), whose sum is σ = 59211156672. Its totient is φ = 7390986240.

The previous prime is 22546144267. The next prime is 22546144321. The reversal of 22546144272 is 27244164522.

It is a self number, because there is not a number n which added to its sum of digits gives 22546144272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2055988 + ... + 2066924.

Almost surely, 2^22546144272 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 22546144272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29605578336).

22546144272 is an abundant number, since it is smaller than the sum of its proper divisors (36665012400).

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

22546144272 is a wasteful number, since it uses less digits than its factorization.

22546144272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11656 (or 11650 counting only the distinct ones).

The product of its digits is 215040, while the sum is 39.

The spelling of 22546144272 in words is "twenty-two billion, five hundred forty-six million, one hundred forty-four thousand, two hundred seventy-two".