25601051251 has 2 divisors, whose sum is σ = 25601051252. Its totient is φ = 25601051250.

The previous prime is 25601051243. The next prime is 25601051261. The reversal of 25601051251 is 15215010652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25601051251 - 2³ = 25601051243 is a prime.

It is not a weakly prime, because it can be changed into another prime (25601051221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800525625 + 12800525626.

It is an arithmetic number, because the mean of its divisors is an integer number (12800525626).

Almost surely, 2^25601051251 is an apocalyptic number.

25601051251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601051251 is an equidigital number, since it uses as much as digits as its factorization.

25601051251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 25601051251 in words is "twenty-five billion, six hundred one million, fifty-one thousand, two hundred fifty-one".