113204252565 has 20 divisors (see below), whose sum is σ = 202929105324. Its totient is φ = 60375601152.

The previous prime is 113204252521. The next prime is 113204252569. The reversal of 113204252565 is 565252402311.

113204252565 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 0 + 42 + 52 + 565 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52294999761 + 60909252804 = 228681^2 + 246798^2 .

It is not a de Polignac number, because 113204252565 - 2⁶ = 113204252501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113204252569) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 139757932 + ... + 139758741.

Almost surely, 2^113204252565 is an apocalyptic number.

113204252565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113204252565 is a deficient number, since it is larger than the sum of its proper divisors (89724852759).

113204252565 is an equidigital number, since it uses as much as digits as its factorization.

113204252565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279516690 (or 279516681 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 113204252565 its reverse (565252402311), we get a palindrome (678456654876).

The spelling of 113204252565 in words is "one hundred thirteen billion, two hundred four million, two hundred fifty-two thousand, five hundred sixty-five".