25990951229 has 2 divisors, whose sum is σ = 25990951230. Its totient is φ = 25990951228.

The previous prime is 25990951201. The next prime is 25990951243. The reversal of 25990951229 is 92215909952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22800396004 + 3190555225 = 150998^2 + 56485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25990951229 is a prime.

It is a super-2 number, since 2×25990951229² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25990959229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12995475614 + 12995475615.

It is an arithmetic number, because the mean of its divisors is an integer number (12995475615).

Almost surely, 2^25990951229 is an apocalyptic number.

It is an amenable number.

25990951229 is a deficient number, since it is larger than the sum of its proper divisors (1).

25990951229 is an equidigital number, since it uses as much as digits as its factorization.

25990951229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1312200, while the sum is 53.

The spelling of 25990951229 in words is "twenty-five billion, nine hundred ninety million, nine hundred fifty-one thousand, two hundred twenty-nine".