25867949137 has 2 divisors, whose sum is σ = 25867949138. Its totient is φ = 25867949136.

The previous prime is 25867949119. The next prime is 25867949167. The reversal of 25867949137 is 73194976852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24538909201 + 1329039936 = 156649^2 + 36456^2 .

It is a cyclic number.

It is not a de Polignac number, because 25867949137 - 2¹¹ = 25867947089 is a prime.

It is not a weakly prime, because it can be changed into another prime (25867949117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12933974568 + 12933974569.

It is an arithmetic number, because the mean of its divisors is an integer number (12933974569).

Almost surely, 2^25867949137 is an apocalyptic number.

It is an amenable number.

25867949137 is a deficient number, since it is larger than the sum of its proper divisors (1).

25867949137 is an equidigital number, since it uses as much as digits as its factorization.

25867949137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The spelling of 25867949137 in words is "twenty-five billion, eight hundred sixty-seven million, nine hundred forty-nine thousand, one hundred thirty-seven".