25917765941 has 2 divisors, whose sum is σ = 25917765942. Its totient is φ = 25917765940.

The previous prime is 25917765931. The next prime is 25917765961. The reversal of 25917765941 is 14956771952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16007563441 + 9910202500 = 126521^2 + 99550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25917765941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25917765931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12958882970 + 12958882971.

It is an arithmetic number, because the mean of its divisors is an integer number (12958882971).

Almost surely, 2^25917765941 is an apocalyptic number.

It is an amenable number.

25917765941 is a deficient number, since it is larger than the sum of its proper divisors (1).

25917765941 is an equidigital number, since it uses as much as digits as its factorization.

25917765941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 56.

The spelling of 25917765941 in words is "twenty-five billion, nine hundred seventeen million, seven hundred sixty-five thousand, nine hundred forty-one".