23440637641 has 4 divisors (see below), whose sum is σ = 23545752832. Its totient is φ = 23335522452.

The previous prime is 23440637617. The next prime is 23440637719. The reversal of 23440637641 is 14673604432.

It is a happy number.

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 23440637641 - 2⁵ = 23440637609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23440637594 and 23440637603.

It is not an unprimeable number, because it can be changed into a prime (23440632641) 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, 52557261 + ... + 52557706.

It is an arithmetic number, because the mean of its divisors is an integer number (5886438208).

Almost surely, 2^23440637641 is an apocalyptic number.

It is an amenable number.

23440637641 is a deficient number, since it is larger than the sum of its proper divisors (105115191).

23440637641 is a wasteful number, since it uses less digits than its factorization.

23440637641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105115190.

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 23440637641 in words is "twenty-three billion, four hundred forty million, six hundred thirty-seven thousand, six hundred forty-one".