2678742049 has 2 divisors, whose sum is σ = 2678742050. Its totient is φ = 2678742048.

The previous prime is 2678741993. The next prime is 2678742109. The reversal of 2678742049 is 9402478762.

It is a happy number.

2678742049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2506003600 + 172738449 = 50060^2 + 13143^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678742049 - 2²¹ = 2676644897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2678741993 and 2678742011.

It is not a weakly prime, because it can be changed into another prime (2678752049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339371024 + 1339371025.

It is an arithmetic number, because the mean of its divisors is an integer number (1339371025).

Almost surely, 2^2678742049 is an apocalyptic number.

It is an amenable number.

2678742049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678742049 is an equidigital number, since it uses as much as digits as its factorization.

2678742049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The square root of 2678742049 is about 51756.5652743688. The cubic root of 2678742049 is about 1388.8125477971.

The spelling of 2678742049 in words is "two billion, six hundred seventy-eight million, seven hundred forty-two thousand, forty-nine".