25088721577891 has 2 divisors, whose sum is σ = 25088721577892. Its totient is φ = 25088721577890.

The previous prime is 25088721577877. The next prime is 25088721577901. The reversal of 25088721577891 is 19877512788052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25088721577891 - 2⁹ = 25088721577379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25088721577891.

It is not a weakly prime, because it can be changed into another prime (25088721577841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12544360788945 + 12544360788946.

It is an arithmetic number, because the mean of its divisors is an integer number (12544360788946).

Almost surely, 2^{25088721577891} is an apocalyptic number.

25088721577891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25088721577891 is an equidigital number, since it uses as much as digits as its factorization.

25088721577891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158054400, while the sum is 70.

The spelling of 25088721577891 in words is "twenty-five trillion, eighty-eight billion, seven hundred twenty-one million, five hundred seventy-seven thousand, eight hundred ninety-one".