2768881949 has 2 divisors, whose sum is σ = 2768881950. Its totient is φ = 2768881948.

The previous prime is 2768881889. The next prime is 2768881957. The reversal of 2768881949 is 9491888672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2762028025 + 6853924 = 52555^2 + 2618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2768881949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2768881891 and 2768881900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2768881649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384440974 + 1384440975.

It is an arithmetic number, because the mean of its divisors is an integer number (1384440975).

Almost surely, 2^2768881949 is an apocalyptic number.

It is an amenable number.

2768881949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2768881949 is an equidigital number, since it uses as much as digits as its factorization.

2768881949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 62.

The square root of 2768881949 is about 52620.1667519213. The cubic root of 2768881949 is about 1404.2188975683.

The spelling of 2768881949 in words is "two billion, seven hundred sixty-eight million, eight hundred eighty-one thousand, nine hundred forty-nine".