25726057081 has 2 divisors, whose sum is σ = 25726057082. Its totient is φ = 25726057080.

The previous prime is 25726057009. The next prime is 25726057111. The reversal of 25726057081 is 18075062752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21007603600 + 4718453481 = 144940^2 + 68691^2 .

It is a cyclic number.

It is not a de Polignac number, because 25726057081 - 2¹³ = 25726048889 is a prime.

It is a super-2 number, since 2×25726057081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25726051081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12863028540 + 12863028541.

It is an arithmetic number, because the mean of its divisors is an integer number (12863028541).

Almost surely, 2^25726057081 is an apocalyptic number.

It is an amenable number.

25726057081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25726057081 is an equidigital number, since it uses as much as digits as its factorization.

25726057081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 25726057081 in words is "twenty-five billion, seven hundred twenty-six million, fifty-seven thousand, eighty-one".