23539663749 has 48 divisors (see below), whose sum is σ = 38461447680. Its totient is φ = 12733549920.

The previous prime is 23539663687. The next prime is 23539663753. The reversal of 23539663749 is 94736693532.

It is not a de Polignac number, because 23539663749 - 2¹⁶ = 23539598213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23539663759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5111682 + ... + 5116284.

It is an arithmetic number, because the mean of its divisors is an integer number (801280160).

Almost surely, 2^23539663749 is an apocalyptic number.

It is an amenable number.

23539663749 is a deficient number, since it is larger than the sum of its proper divisors (14921783931).

23539663749 is a wasteful number, since it uses less digits than its factorization.

23539663749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470 (or 6463 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 57.

The spelling of 23539663749 in words is "twenty-three billion, five hundred thirty-nine million, six hundred sixty-three thousand, seven hundred forty-nine".