25718831401 has 2 divisors, whose sum is σ = 25718831402. Its totient is φ = 25718831400.

The previous prime is 25718831393. The next prime is 25718831431. The reversal of 25718831401 is 10413881752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25496105625 + 222725776 = 159675^2 + 14924^2 .

It is a cyclic number.

It is not a de Polignac number, because 25718831401 - 2³ = 25718831393 is a prime.

It is a super-2 number, since 2×25718831401² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25718831431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859415700 + 12859415701.

It is an arithmetic number, because the mean of its divisors is an integer number (12859415701).

Almost surely, 2^25718831401 is an apocalyptic number.

It is an amenable number.

25718831401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25718831401 is an equidigital number, since it uses as much as digits as its factorization.

25718831401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 25718831401 in words is "twenty-five billion, seven hundred eighteen million, eight hundred thirty-one thousand, four hundred one".