25582918957 has 2 divisors, whose sum is σ = 25582918958. Its totient is φ = 25582918956.

The previous prime is 25582918931. The next prime is 25582918987. The reversal of 25582918957 is 75981928552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21224410596 + 4358508361 = 145686^2 + 66019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25582918957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25582918895 and 25582918904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25582918987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791459478 + 12791459479.

It is an arithmetic number, because the mean of its divisors is an integer number (12791459479).

Almost surely, 2^25582918957 is an apocalyptic number.

It is an amenable number.

25582918957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25582918957 is an equidigital number, since it uses as much as digits as its factorization.

25582918957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144000, while the sum is 61.

The spelling of 25582918957 in words is "twenty-five billion, five hundred eighty-two million, nine hundred eighteen thousand, nine hundred fifty-seven".