25990107461 has 2 divisors, whose sum is σ = 25990107462. Its totient is φ = 25990107460.

The previous prime is 25990107457. The next prime is 25990107491. The reversal of 25990107461 is 16470109952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22256164225 + 3733943236 = 149185^2 + 61106^2 .

It is a cyclic number.

It is not a de Polignac number, because 25990107461 - 2² = 25990107457 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25990107491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12995053730 + 12995053731.

It is an arithmetic number, because the mean of its divisors is an integer number (12995053731).

Almost surely, 2^25990107461 is an apocalyptic number.

It is an amenable number.

25990107461 is a deficient number, since it is larger than the sum of its proper divisors (1).

25990107461 is an equidigital number, since it uses as much as digits as its factorization.

25990107461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 25990107461 in words is "twenty-five billion, nine hundred ninety million, one hundred seven thousand, four hundred sixty-one".