25919262731 has 2 divisors, whose sum is σ = 25919262732. Its totient is φ = 25919262730.

The previous prime is 25919262713. The next prime is 25919262739. The reversal of 25919262731 is 13726291952.

Together with previous prime (25919262713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25919262731 - 2¹⁴ = 25919246347 is a prime.

It is a super-2 number, since 2×25919262731² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25919262739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12959631365 + 12959631366.

It is an arithmetic number, because the mean of its divisors is an integer number (12959631366).

Almost surely, 2^25919262731 is an apocalyptic number.

25919262731 is a deficient number, since it is larger than the sum of its proper divisors (1).

25919262731 is an equidigital number, since it uses as much as digits as its factorization.

25919262731 is an evil number, because the sum of its binary digits is even.

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

The spelling of 25919262731 in words is "twenty-five billion, nine hundred nineteen million, two hundred sixty-two thousand, seven hundred thirty-one".