23251261653 has 20 divisors (see below), whose sum is σ = 34844373388. Its totient is φ = 15451300800.

The previous prime is 23251261639. The next prime is 23251261661. The reversal of 23251261653 is 35616215232.

23251261653 is a `hidden beast` number, since 2 + 3 + 25 + 12 + 616 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4836228849 + 18415032804 = 69543^2 + 135702^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23251261653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23251261613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 433198 + ... + 483903.

Almost surely, 2^23251261653 is an apocalyptic number.

It is an amenable number.

23251261653 is a deficient number, since it is larger than the sum of its proper divisors (11593111735).

23251261653 is an equidigital number, since it uses as much as digits as its factorization.

23251261653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917426 (or 917417 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 23251261653 its reverse (35616215232), we get a palindrome (58867476885).

The spelling of 23251261653 in words is "twenty-three billion, two hundred fifty-one million, two hundred sixty-one thousand, six hundred fifty-three".