23515243613 has 16 divisors (see below), whose sum is σ = 23929332336. Its totient is φ = 23105617920.

The previous prime is 23515243603. The next prime is 23515243639. The reversal of 23515243613 is 31634251532.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5697532324 + 17817711289 = 75482^2 + 133483^2 .

It is a cyclic number.

It is not a de Polignac number, because 23515243613 - 2⁴ = 23515243597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23515243603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7218281 + ... + 7221537.

It is an arithmetic number, because the mean of its divisors is an integer number (1495583271).

Almost surely, 2^23515243613 is an apocalyptic number.

It is an amenable number.

23515243613 is a deficient number, since it is larger than the sum of its proper divisors (414088723).

23515243613 is a wasteful number, since it uses less digits than its factorization.

23515243613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904.

The product of its digits is 64800, while the sum is 35.

The spelling of 23515243613 in words is "twenty-three billion, five hundred fifteen million, two hundred forty-three thousand, six hundred thirteen".