25911630947 has 2 divisors, whose sum is σ = 25911630948. Its totient is φ = 25911630946.

The previous prime is 25911630937. The next prime is 25911631001. The reversal of 25911630947 is 74903611952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25911630947 - 2⁶ = 25911630883 is a prime.

It is not a weakly prime, because it can be changed into another prime (25911630937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12955815473 + 12955815474.

It is an arithmetic number, because the mean of its divisors is an integer number (12955815474).

Almost surely, 2^25911630947 is an apocalyptic number.

25911630947 is a deficient number, since it is larger than the sum of its proper divisors (1).

25911630947 is an equidigital number, since it uses as much as digits as its factorization.

25911630947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 25911630947 in words is "twenty-five billion, nine hundred eleven million, six hundred thirty thousand, nine hundred forty-seven".