25765767331 has 2 divisors, whose sum is σ = 25765767332. Its totient is φ = 25765767330.

The previous prime is 25765767281. The next prime is 25765767347. The reversal of 25765767331 is 13376756752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25765767331 is a prime.

It is a super-2 number, since 2×25765767331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25765767631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12882883665 + 12882883666.

It is an arithmetic number, because the mean of its divisors is an integer number (12882883666).

Almost surely, 2^25765767331 is an apocalyptic number.

25765767331 is a deficient number, since it is larger than the sum of its proper divisors (1).

25765767331 is an equidigital number, since it uses as much as digits as its factorization.

25765767331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5556600, while the sum is 52.

The spelling of 25765767331 in words is "twenty-five billion, seven hundred sixty-five million, seven hundred sixty-seven thousand, three hundred thirty-one".