25309978627 has 2 divisors, whose sum is σ = 25309978628. Its totient is φ = 25309978626.

The previous prime is 25309978609. The next prime is 25309978643. The reversal of 25309978627 is 72687990352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25309978627 - 2¹¹ = 25309976579 is a prime.

It is not a weakly prime, because it can be changed into another prime (25309978327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12654989313 + 12654989314.

It is an arithmetic number, because the mean of its divisors is an integer number (12654989314).

Almost surely, 2^25309978627 is an apocalyptic number.

25309978627 is a deficient number, since it is larger than the sum of its proper divisors (1).

25309978627 is an equidigital number, since it uses as much as digits as its factorization.

25309978627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 25309978627 in words is "twenty-five billion, three hundred nine million, nine hundred seventy-eight thousand, six hundred twenty-seven".