23256551549 has 12 divisors (see below), whose sum is σ = 29512952928. Its totient is φ = 18121987800.

The previous prime is 23256551489. The next prime is 23256551557. The reversal of 23256551549 is 94515565232.

It is a de Polignac number, because none of the positive numbers 2^k-23256551549 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 (23256551569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21573257 + ... + 21574334.

It is an arithmetic number, because the mean of its divisors is an integer number (2459412744).

Almost surely, 2^23256551549 is an apocalyptic number.

It is an amenable number.

23256551549 is a deficient number, since it is larger than the sum of its proper divisors (6256401379).

23256551549 is a wasteful number, since it uses less digits than its factorization.

23256551549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43147616 (or 43147609 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 47.

The spelling of 23256551549 in words is "twenty-three billion, two hundred fifty-six million, five hundred fifty-one thousand, five hundred forty-nine".