25921093901 has 2 divisors, whose sum is σ = 25921093902. Its totient is φ = 25921093900.

The previous prime is 25921093897. The next prime is 25921093997. The reversal of 25921093901 is 10939012952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25201245001 + 719848900 = 158749^2 + 26830^2 .

It is a cyclic number.

It is not a de Polignac number, because 25921093901 - 2² = 25921093897 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25921093001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12960546950 + 12960546951.

It is an arithmetic number, because the mean of its divisors is an integer number (12960546951).

Almost surely, 2^25921093901 is an apocalyptic number.

It is an amenable number.

25921093901 is a deficient number, since it is larger than the sum of its proper divisors (1).

25921093901 is an equidigital number, since it uses as much as digits as its factorization.

25921093901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 41.

The spelling of 25921093901 in words is "twenty-five billion, nine hundred twenty-one million, ninety-three thousand, nine hundred one".