22445290661 has 4 divisors (see below), whose sum is σ = 22446119424. Its totient is φ = 22444461900.

The previous prime is 22445290643. The next prime is 22445290663. The reversal of 22445290661 is 16609254422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22445290661 - 2²² = 22441096357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445290663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372335 + ... + 428396.

It is an arithmetic number, because the mean of its divisors is an integer number (5611529856).

Almost surely, 2^22445290661 is an apocalyptic number.

It is an amenable number.

22445290661 is a deficient number, since it is larger than the sum of its proper divisors (828763).

22445290661 is an equidigital number, since it uses as much as digits as its factorization.

22445290661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828762.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 22445290661 in words is "twenty-two billion, four hundred forty-five million, two hundred ninety thousand, six hundred sixty-one".