2774948494781 has 2 divisors, whose sum is σ = 2774948494782. Its totient is φ = 2774948494780.

The previous prime is 2774948494679. The next prime is 2774948494793. The reversal of 2774948494781 is 1874948494772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2254003779556 + 520944715225 = 1501334^2 + 721765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2774948494781 - 2³⁴ = 2757768625597 is a prime.

It is a super-2 number, since 2×2774948494781² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2774948494699 and 2774948494708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2774948490781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1387474247390 + 1387474247391.

It is an arithmetic number, because the mean of its divisors is an integer number (1387474247391).

Almost surely, 2^{2774948494781} is an apocalyptic number.

It is an amenable number.

2774948494781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2774948494781 is an equidigital number, since it uses as much as digits as its factorization.

2774948494781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 910393344, while the sum is 74.

Subtracting from 2774948494781 its reverse (1874948494772), we obtain a palindrome (900000000009).

The spelling of 2774948494781 in words is "two trillion, seven hundred seventy-four billion, nine hundred forty-eight million, four hundred ninety-four thousand, seven hundred eighty-one".