23751406525621 has 2 divisors, whose sum is σ = 23751406525622. Its totient is φ = 23751406525620.

The previous prime is 23751406525541. The next prime is 23751406525657. The reversal of 23751406525621 is 12652560415732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15378711264900 + 8372695260721 = 3921570^2 + 2893561^2 .

It is a cyclic number.

It is not a de Polignac number, because 23751406525621 - 2²¹ = 23751404428469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23751406526621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11875703262810 + 11875703262811.

It is an arithmetic number, because the mean of its divisors is an integer number (11875703262811).

Almost surely, 2^{23751406525621} is an apocalyptic number.

It is an amenable number.

23751406525621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23751406525621 is an equidigital number, since it uses as much as digits as its factorization.

23751406525621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 23751406525621 in words is "twenty-three trillion, seven hundred fifty-one billion, four hundred six million, five hundred twenty-five thousand, six hundred twenty-one".