23137505779 has 4 divisors (see below), whose sum is σ = 23629793184. Its totient is φ = 22645218376.

The previous prime is 23137505761. The next prime is 23137505819. The reversal of 23137505779 is 97750573132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23137505779 - 2¹¹ = 23137503731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23137565779) 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, 246143632 + ... + 246143725.

It is an arithmetic number, because the mean of its divisors is an integer number (5907448296).

Almost surely, 2^23137505779 is an apocalyptic number.

23137505779 is a deficient number, since it is larger than the sum of its proper divisors (492287405).

23137505779 is an equidigital number, since it uses as much as digits as its factorization.

23137505779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492287404.

The product of its (nonzero) digits is 1389150, while the sum is 49.

It can be divided in two parts, 2313750 and 5779, that added together give a square (2319529 = 1523²).

The spelling of 23137505779 in words is "twenty-three billion, one hundred thirty-seven million, five hundred five thousand, seven hundred seventy-nine".