23199907725521 has 2 divisors, whose sum is σ = 23199907725522. Its totient is φ = 23199907725520.

The previous prime is 23199907725503. The next prime is 23199907725541. The reversal of 23199907725521 is 12552770999132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14993630809921 + 8206276915600 = 3872161^2 + 2864660^2 .

It is a cyclic number.

It is not a de Polignac number, because 23199907725521 - 2²⁶ = 23199840616657 is a prime.

It is not a weakly prime, because it can be changed into another prime (23199907725541) 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 as a sum of consecutive naturals, namely, 11599953862760 + 11599953862761.

It is an arithmetic number, because the mean of its divisors is an integer number (11599953862761).

Almost surely, 2^{23199907725521} is an apocalyptic number.

It is an amenable number.

23199907725521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23199907725521 is an equidigital number, since it uses as much as digits as its factorization.

23199907725521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 23199907725521 in words is "twenty-three trillion, one hundred ninety-nine billion, nine hundred seven million, seven hundred twenty-five thousand, five hundred twenty-one".