25812278251 has 2 divisors, whose sum is σ = 25812278252. Its totient is φ = 25812278250.

The previous prime is 25812278237. The next prime is 25812278257. The reversal of 25812278251 is 15287221852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25812278251 - 2³³ = 17222343659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25812278198 and 25812278207.

It is not a weakly prime, because it can be changed into another prime (25812278257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12906139125 + 12906139126.

It is an arithmetic number, because the mean of its divisors is an integer number (12906139126).

Almost surely, 2^25812278251 is an apocalyptic number.

25812278251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25812278251 is an equidigital number, since it uses as much as digits as its factorization.

25812278251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 179200, while the sum is 43.

The spelling of 25812278251 in words is "twenty-five billion, eight hundred twelve million, two hundred seventy-eight thousand, two hundred fifty-one".