23537385517 has 2 divisors, whose sum is σ = 23537385518. Its totient is φ = 23537385516.

The previous prime is 23537385467. The next prime is 23537385563. The reversal of 23537385517 is 71558373532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21228198601 + 2309186916 = 145699^2 + 48054^2 .

It is a cyclic number.

It is not a de Polignac number, because 23537385517 - 2¹¹ = 23537383469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23537388517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11768692758 + 11768692759.

It is an arithmetic number, because the mean of its divisors is an integer number (11768692759).

Almost surely, 2^23537385517 is an apocalyptic number.

It is an amenable number.

23537385517 is a deficient number, since it is larger than the sum of its proper divisors (1).

23537385517 is an equidigital number, since it uses as much as digits as its factorization.

23537385517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 49.

The spelling of 23537385517 in words is "twenty-three billion, five hundred thirty-seven million, three hundred eighty-five thousand, five hundred seventeen".