25291510291 has 2 divisors, whose sum is σ = 25291510292. Its totient is φ = 25291510290.

The previous prime is 25291510259. The next prime is 25291510319. The reversal of 25291510291 is 19201519252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25291510291 - 2⁵ = 25291510259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25291510291.

It is not a weakly prime, because it can be changed into another prime (25298510291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12645755145 + 12645755146.

It is an arithmetic number, because the mean of its divisors is an integer number (12645755146).

Almost surely, 2^25291510291 is an apocalyptic number.

25291510291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25291510291 is an equidigital number, since it uses as much as digits as its factorization.

25291510291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 25291510291 in words is "twenty-five billion, two hundred ninety-one million, five hundred ten thousand, two hundred ninety-one".