2774374781 has 2 divisors, whose sum is σ = 2774374782. Its totient is φ = 2774374780.

The previous prime is 2774374777. The next prime is 2774374787. The reversal of 2774374781 is 1874734772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1479094681 + 1295280100 = 38459^2 + 35990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2774374781 - 2² = 2774374777 is a prime.

It is a super-2 number, since 2×2774374781² = 15394310850897595922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2774374787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387187390 + 1387187391.

It is an arithmetic number, because the mean of its divisors is an integer number (1387187391).

Almost surely, 2^2774374781 is an apocalyptic number.

It is an amenable number.

2774374781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2774374781 is an equidigital number, since it uses as much as digits as its factorization.

2774374781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843968, while the sum is 50.

The square root of 2774374781 is about 52672.3341138401. The cubic root of 2774374781 is about 1405.1468345335.

The spelling of 2774374781 in words is "two billion, seven hundred seventy-four million, three hundred seventy-four thousand, seven hundred eighty-one".