16250507261 has 2 divisors, whose sum is σ = 16250507262. Its totient is φ = 16250507260.

The previous prime is 16250507249. The next prime is 16250507369. The reversal of 16250507261 is 16270505261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8575871236 + 7674636025 = 92606^2 + 87605^2 .

It is a cyclic number.

It is not a de Polignac number, because 16250507261 - 2⁶ = 16250507197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16250507201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8125253630 + 8125253631.

It is an arithmetic number, because the mean of its divisors is an integer number (8125253631).

Almost surely, 2^16250507261 is an apocalyptic number.

It is an amenable number.

16250507261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16250507261 is an equidigital number, since it uses as much as digits as its factorization.

16250507261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 16250507261 in words is "sixteen billion, two hundred fifty million, five hundred seven thousand, two hundred sixty-one".