25582407197 has 2 divisors, whose sum is σ = 25582407198. Its totient is φ = 25582407196.

The previous prime is 25582407161. The next prime is 25582407209. The reversal of 25582407197 is 79170428552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24970636441 + 611770756 = 158021^2 + 24734^2 .

It is a cyclic number.

It is not a de Polignac number, because 25582407197 - 2³⁴ = 8402538013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25582407127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791203598 + 12791203599.

It is an arithmetic number, because the mean of its divisors is an integer number (12791203599).

Almost surely, 2^25582407197 is an apocalyptic number.

It is an amenable number.

25582407197 is a deficient number, since it is larger than the sum of its proper divisors (1).

25582407197 is an equidigital number, since it uses as much as digits as its factorization.

25582407197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 25582407197 in words is "twenty-five billion, five hundred eighty-two million, four hundred seven thousand, one hundred ninety-seven".