25777013231 has 2 divisors, whose sum is σ = 25777013232. Its totient is φ = 25777013230.

The previous prime is 25777013209. The next prime is 25777013237. The reversal of 25777013231 is 13231077752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25777013231 - 2²² = 25772818927 is a prime.

It is a super-2 number, since 2×25777013231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25777013237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888506615 + 12888506616.

It is an arithmetic number, because the mean of its divisors is an integer number (12888506616).

Almost surely, 2^25777013231 is an apocalyptic number.

25777013231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25777013231 is an equidigital number, since it uses as much as digits as its factorization.

25777013231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 38.

The spelling of 25777013231 in words is "twenty-five billion, seven hundred seventy-seven million, thirteen thousand, two hundred thirty-one".