22737461616721 has 4 divisors (see below), whose sum is σ = 22737517446244. Its totient is φ = 22737405787200.

The previous prime is 22737461616659. The next prime is 22737461616763. The reversal of 22737461616721 is 12761616473722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15695550221121 + 7041911395600 = 3961761^2 + 2653660^2 .

It is a cyclic number.

It is not a de Polignac number, because 22737461616721 - 2¹⁹ = 22737461092433 is a prime.

It is a super-2 number, since 2×22737461616721² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22737461616521) 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, 27299340 + ... + 28119901.

It is an arithmetic number, because the mean of its divisors is an integer number (5684379361561).

Almost surely, 2^{22737461616721} is an apocalyptic number.

It is an amenable number.

22737461616721 is a deficient number, since it is larger than the sum of its proper divisors (55829523).

22737461616721 is an equidigital number, since it uses as much as digits as its factorization.

22737461616721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55829522.

The product of its digits is 7112448, while the sum is 55.

The spelling of 22737461616721 in words is "twenty-two trillion, seven hundred thirty-seven billion, four hundred sixty-one million, six hundred sixteen thousand, seven hundred twenty-one".