25630669651 has 2 divisors, whose sum is σ = 25630669652. Its totient is φ = 25630669650.

The previous prime is 25630669607. The next prime is 25630669681. The reversal of 25630669651 is 15696603652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25630669651 - 2¹⁵ = 25630636883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25630669595 and 25630669604.

It is not a weakly prime, because it can be changed into another prime (25630669681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815334825 + 12815334826.

It is an arithmetic number, because the mean of its divisors is an integer number (12815334826).

Almost surely, 2^25630669651 is an apocalyptic number.

25630669651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630669651 is an equidigital number, since it uses as much as digits as its factorization.

25630669651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 49.

The spelling of 25630669651 in words is "twenty-five billion, six hundred thirty million, six hundred sixty-nine thousand, six hundred fifty-one".