22490700961 has 3 divisors (see below), whose sum is σ = 22490850931. Its totient is φ = 22490550992.

The previous prime is 22490700937. The next prime is 22490700979. The reversal of 22490700961 is 16900709422.

The square root of 22490700961 is 149969.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 218123361 + 22272577600 = 14769^2 + 149240^2 .

It is not a de Polignac number, because 22490700961 - 2²³ = 22482312353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22490700461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 74985 + ... + 224953.

Almost surely, 2^22490700961 is an apocalyptic number.

22490700961 is the 149969-th square number.

22490700961 is the 74985-th centered octagonal number.

It is an amenable number.

22490700961 is a deficient number, since it is larger than the sum of its proper divisors (149970).

22490700961 is an frugal number, since it uses more digits than its factorization.

22490700961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299938 (or 149969 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 22490700961 in words is "twenty-two billion, four hundred ninety million, seven hundred thousand, nine hundred sixty-one".