23444764561 has 4 divisors (see below), whose sum is σ = 23512329072. Its totient is φ = 23377200052.

The previous prime is 23444764559. The next prime is 23444764573. The reversal of 23444764561 is 16546744432.

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 23444764561 - 2¹ = 23444764559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23444764061) 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, 33781735 + ... + 33782428.

It is an arithmetic number, because the mean of its divisors is an integer number (5878082268).

Almost surely, 2^23444764561 is an apocalyptic number.

It is an amenable number.

23444764561 is a deficient number, since it is larger than the sum of its proper divisors (67564511).

23444764561 is an equidigital number, since it uses as much as digits as its factorization.

23444764561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67564510.

The product of its digits is 1935360, while the sum is 46.

The spelling of 23444764561 in words is "twenty-three billion, four hundred forty-four million, seven hundred sixty-four thousand, five hundred sixty-one".