25439650651 has 2 divisors, whose sum is σ = 25439650652. Its totient is φ = 25439650650.

The previous prime is 25439650631. The next prime is 25439650679. The reversal of 25439650651 is 15605693452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25439650651 - 2¹¹ = 25439648603 is a prime.

It is a super-3 number, since 3×25439650651³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25439650631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12719825325 + 12719825326.

It is an arithmetic number, because the mean of its divisors is an integer number (12719825326).

Almost surely, 2^25439650651 is an apocalyptic number.

25439650651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25439650651 is an equidigital number, since it uses as much as digits as its factorization.

25439650651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 25439650651 in words is "twenty-five billion, four hundred thirty-nine million, six hundred fifty thousand, six hundred fifty-one".