22747772772 has 18 divisors (see below), whose sum is σ = 57501314598. Its totient is φ = 7582590912.

The previous prime is 22747772771. The next prime is 22747772779. The reversal of 22747772772 is 27727774722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14183380836 + 8564391936 = 119094^2 + 92544^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×22747772772² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22747772771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315941253 + ... + 315941324.

Almost surely, 2^22747772772 is an apocalyptic number.

It is an amenable number.

22747772772 is an abundant number, since it is smaller than the sum of its proper divisors (34753541826).

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

22747772772 is a wasteful number, since it uses less digits than its factorization.

22747772772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631882587 (or 631882582 counting only the distinct ones).

The product of its digits is 7529536, while the sum is 54.

The spelling of 22747772772 in words is "twenty-two billion, seven hundred forty-seven million, seven hundred seventy-two thousand, seven hundred seventy-two".