22156125640 has 64 divisors (see below), whose sum is σ = 54441668160. Its totient is φ = 8048113920.

The previous prime is 22156125631. The next prime is 22156125703. The reversal of 22156125640 is 4652165122.

It is a junction number, because it is equal to n+sod(n) for n = 22156125596 and 22156125605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390094 + ... + 443266.

It is an arithmetic number, because the mean of its divisors is an integer number (850651065).

Almost surely, 2^22156125640 is an apocalyptic number.

22156125640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156125640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27220834080).

22156125640 is an abundant number, since it is smaller than the sum of its proper divisors (32285542520).

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

22156125640 is a wasteful number, since it uses less digits than its factorization.

22156125640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54142 (or 54138 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 22156125640 in words is "twenty-two billion, one hundred fifty-six million, one hundred twenty-five thousand, six hundred forty".