23201591140809 has 27 divisors (see below), whose sum is σ = 34351623436117. Its totient is φ = 15090080438400.

The previous prime is 23201591140781. The next prime is 23201591140817. The reversal of 23201591140809 is 90804119510232.

The square root of 23201591140809 is 4816803.

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

23201591140809 is a `hidden beast` number, since 23 + 20 + 1 + 591 + 14 + 0 + 8 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7636672483209 + 15564918657600 = 2763453^2 + 3945240^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23201591140809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23201591141809) 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, 592447189 + ... + 592486349.

Almost surely, 2^{23201591140809} is an apocalyptic number.

23201591140809 is the 4816803-rd square number.

23201591140809 is the 2408402-nd centered octagonal number.

It is an amenable number.

23201591140809 is a deficient number, since it is larger than the sum of its proper divisors (11150032295308).

23201591140809 is an frugal number, since it uses more digits than its factorization.

23201591140809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78410 (or 39205 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 23201591140809 in words is "twenty-three trillion, two hundred one billion, five hundred ninety-one million, one hundred forty thousand, eight hundred nine".