23641620930225 has 27 divisors (see below), whose sum is σ = 42344900566059. Its totient is φ = 12608825598000.

The previous prime is 23641620930181. The next prime is 23641620930229. The reversal of 23641620930225 is 52203902614632.

The square root of 23641620930225 is 4862265.

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

23641620930225 is a `hidden beast` number, since 2 + 3 + 6 + 416 + 2 + 0 + 9 + 3 + 0 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8510983534881 + 15130637395344 = 2917359^2 + 3889812^2 .

It is not a de Polignac number, because 23641620930225 - 2⁹ = 23641620929713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (23641620930229) 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, 72771900 + ... + 73096050.

Almost surely, 2^{23641620930225} is an apocalyptic number.

23641620930225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

23641620930225 is the 4862265-th square number.

23641620930225 is the 2431133-rd centered octagonal number.

It is an amenable number.

23641620930225 is a deficient number, since it is larger than the sum of its proper divisors (18703279635834).

23641620930225 is an frugal number, since it uses more digits than its factorization.

23641620930225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648318 (or 324159 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 23641620930225 in words is "twenty-three trillion, six hundred forty-one billion, six hundred twenty million, nine hundred thirty thousand, two hundred twenty-five".