25677769291 has 2 divisors, whose sum is σ = 25677769292. Its totient is φ = 25677769290.

The previous prime is 25677769283. The next prime is 25677769387. The reversal of 25677769291 is 19296777652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25677769291 - 2³ = 25677769283 is a prime.

It is not a weakly prime, because it can be changed into another prime (25677763291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838884645 + 12838884646.

It is an arithmetic number, because the mean of its divisors is an integer number (12838884646).

Almost surely, 2^25677769291 is an apocalyptic number.

25677769291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25677769291 is an equidigital number, since it uses as much as digits as its factorization.

25677769291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20003760, while the sum is 61.

The spelling of 25677769291 in words is "twenty-five billion, six hundred seventy-seven million, seven hundred sixty-nine thousand, two hundred ninety-one".