23578861621249 has 27 divisors (see below), whose sum is σ = 26418664444809. Its totient is φ = 21028363561920.

The previous prime is 23578861621229. The next prime is 23578861621253. The reversal of 23578861621249 is 94212616887532.

The square root of 23578861621249 is 4855807.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 914901815025 + 22663959806224 = 956505^2 + 4760668^2 .

It is not a de Polignac number, because 23578861621249 - 2⁹ = 23578861620737 is a prime.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23578861621229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2830931317 + ... + 2830939645.

Almost surely, 2^{23578861621249} is an apocalyptic number.

23578861621249 is the 4855807-th square number.

23578861621249 is the 2427904-th centered octagonal number.

It is an amenable number.

23578861621249 is a deficient number, since it is larger than the sum of its proper divisors (2839802823560).

23578861621249 is an frugal number, since it uses more digits than its factorization.

23578861621249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16786 (or 8393 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 64.

The spelling of 23578861621249 in words is "twenty-three trillion, five hundred seventy-eight billion, eight hundred sixty-one million, six hundred twenty-one thousand, two hundred forty-nine".