25547688674591 has 2 divisors, whose sum is σ = 25547688674592. Its totient is φ = 25547688674590.

The previous prime is 25547688674539. The next prime is 25547688674633. The reversal of 25547688674591 is 19547688674552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25547688674591 - 2²² = 25547684480287 is a prime.

It is a super-3 number, since 3×25547688674591³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25547688677591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12773844337295 + 12773844337296.

It is an arithmetic number, because the mean of its divisors is an integer number (12773844337296).

Almost surely, 2^{25547688674591} is an apocalyptic number.

25547688674591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25547688674591 is an equidigital number, since it uses as much as digits as its factorization.

25547688674591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256000, while the sum is 77.

The spelling of 25547688674591 in words is "twenty-five trillion, five hundred forty-seven billion, six hundred eighty-eight million, six hundred seventy-four thousand, five hundred ninety-one".