23172591649 has 8 divisors (see below), whose sum is σ = 23232798720. Its totient is φ = 23112460800.

The previous prime is 23172591643. The next prime is 23172591661. The reversal of 23172591649 is 94619527132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23172591649 - 2¹⁵ = 23172558881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23172591643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616992 + ... + 653470.

It is an arithmetic number, because the mean of its divisors is an integer number (2904099840).

Almost surely, 2^23172591649 is an apocalyptic number.

It is an amenable number.

23172591649 is a deficient number, since it is larger than the sum of its proper divisors (60207071).

23172591649 is an equidigital number, since it uses as much as digits as its factorization.

23172591649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38111.

The product of its digits is 816480, while the sum is 49.

The spelling of 23172591649 in words is "twenty-three billion, one hundred seventy-two million, five hundred ninety-one thousand, six hundred forty-nine".