22157651072 has 72 divisors (see below), whose sum is σ = 45105311115. Its totient is φ = 10842210048.

The previous prime is 22157650993. The next prime is 22157651077. The reversal of 22157651072 is 27015675122.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 11078825536 + 11078825536 = 105256^2 + 105256^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105256.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22157651077) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 99361553 + ... + 99361775.

Almost surely, 2^22157651072 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 22157651072

22157651072 is an abundant number, since it is smaller than the sum of its proper divisors (22947660043).

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

22157651072 is an frugal number, since it uses more digits than its factorization.

22157651072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 22157651072 in words is "twenty-two billion, one hundred fifty-seven million, six hundred fifty-one thousand, seventy-two".