25689997051 has 2 divisors, whose sum is σ = 25689997052. Its totient is φ = 25689997050.

The previous prime is 25689997031. The next prime is 25689997087. The reversal of 25689997051 is 15079998652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25689997051 - 2¹¹ = 25689995003 is a prime.

It is not a weakly prime, because it can be changed into another prime (25689997001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12844998525 + 12844998526.

It is an arithmetic number, because the mean of its divisors is an integer number (12844998526).

Almost surely, 2^25689997051 is an apocalyptic number.

25689997051 is a deficient number, since it is larger than the sum of its proper divisors (1).

25689997051 is an equidigital number, since it uses as much as digits as its factorization.

25689997051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 61.

The spelling of 25689997051 in words is "twenty-five billion, six hundred eighty-nine million, nine hundred ninety-seven thousand, fifty-one".