269813980781 has 2 divisors, whose sum is σ = 269813980782. Its totient is φ = 269813980780.

The previous prime is 269813980771. The next prime is 269813980889. The reversal of 269813980781 is 187089318962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222826482025 + 46987498756 = 472045^2 + 216766^2 .

It is a cyclic number.

It is not a de Polignac number, because 269813980781 - 2⁶ = 269813980717 is a prime.

It is a super-2 number, since 2×269813980781² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269813980721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134906990390 + 134906990391.

It is an arithmetic number, because the mean of its divisors is an integer number (134906990391).

Almost surely, 2^269813980781 is an apocalyptic number.

It is an amenable number.

269813980781 is a deficient number, since it is larger than the sum of its proper divisors (1).

269813980781 is an equidigital number, since it uses as much as digits as its factorization.

269813980781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 62.

The spelling of 269813980781 in words is "two hundred sixty-nine billion, eight hundred thirteen million, nine hundred eighty thousand, seven hundred eighty-one".