274778968931 has 2 divisors, whose sum is σ = 274778968932. Its totient is φ = 274778968930.

The previous prime is 274778968909. The next prime is 274778968967. The reversal of 274778968931 is 139869877472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 274778968931 - 2²² = 274774774627 is a prime.

It is a super-2 number, since 2×274778968931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (274778968901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137389484465 + 137389484466.

It is an arithmetic number, because the mean of its divisors is an integer number (137389484466).

Almost surely, 2^274778968931 is an apocalyptic number.

274778968931 is a deficient number, since it is larger than the sum of its proper divisors (1).

274778968931 is an equidigital number, since it uses as much as digits as its factorization.

274778968931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 71.

The spelling of 274778968931 in words is "two hundred seventy-four billion, seven hundred seventy-eight million, nine hundred sixty-eight thousand, nine hundred thirty-one".