23512052613581 has 4 divisors (see below), whose sum is σ = 26870917272672. Its totient is φ = 20153187954492.

The previous prime is 23512052613559. The next prime is 23512052613583. The reversal of 23512052613581 is 18531625021532.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23512052613581 - 2²⁶ = 23511985504717 is a prime.

It is a super-2 number, since 2×23512052613581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23512052613583) 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, 1679432329535 + ... + 1679432329548.

It is an arithmetic number, because the mean of its divisors is an integer number (6717729318168).

Almost surely, 2^{23512052613581} is an apocalyptic number.

It is an amenable number.

23512052613581 is a deficient number, since it is larger than the sum of its proper divisors (3358864659091).

23512052613581 is an equidigital number, since it uses as much as digits as its factorization.

23512052613581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358864659090.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 23512052613581 in words is "twenty-three trillion, five hundred twelve billion, fifty-two million, six hundred thirteen thousand, five hundred eighty-one".