25657934093969 has 2 divisors, whose sum is σ = 25657934093970. Its totient is φ = 25657934093968.

The previous prime is 25657934093963. The next prime is 25657934093977. The reversal of 25657934093969 is 96939043975652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21856214053969 + 3801720040000 = 4675063^2 + 1949800^2 .

It is a cyclic number.

It is not a de Polignac number, because 25657934093969 - 2⁴⁴ = 8065748049553 is a prime.

It is a super-2 number, since 2×25657934093969² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25657934093969.

It is not a weakly prime, because it can be changed into another prime (25657934093963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828967046984 + 12828967046985.

It is an arithmetic number, because the mean of its divisors is an integer number (12828967046985).

Almost surely, 2^{25657934093969} is an apocalyptic number.

It is an amenable number.

25657934093969 is a deficient number, since it is larger than the sum of its proper divisors (1).

25657934093969 is an equidigital number, since it uses as much as digits as its factorization.

25657934093969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2976069600, while the sum is 77.

The spelling of 25657934093969 in words is "twenty-five trillion, six hundred fifty-seven billion, nine hundred thirty-four million, ninety-three thousand, nine hundred sixty-nine".