250609960781 has 2 divisors, whose sum is σ = 250609960782. Its totient is φ = 250609960780.

The previous prime is 250609960739. The next prime is 250609960807. The reversal of 250609960781 is 187069906052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243501784681 + 7108176100 = 493459^2 + 84310^2 .

It is a cyclic number.

It is not a de Polignac number, because 250609960781 - 2⁶ = 250609960717 is a prime.

It is a super-2 number, since 2×250609960781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250609960721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125304980390 + 125304980391.

It is an arithmetic number, because the mean of its divisors is an integer number (125304980391).

Almost surely, 2^250609960781 is an apocalyptic number.

It is an amenable number.

250609960781 is a deficient number, since it is larger than the sum of its proper divisors (1).

250609960781 is an equidigital number, since it uses as much as digits as its factorization.

250609960781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 250609960781 in words is "two hundred fifty billion, six hundred nine million, nine hundred sixty thousand, seven hundred eighty-one".