2768679649 has 4 divisors (see below), whose sum is σ = 2768836036. Its totient is φ = 2768523264.

The previous prime is 2768679593. The next prime is 2768679691. The reversal of 2768679649 is 9469768672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 373262400 + 2395417249 = 19320^2 + 48943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2768679649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2768679049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47664 + ... + 88369.

It is an arithmetic number, because the mean of its divisors is an integer number (692209009).

Almost surely, 2^2768679649 is an apocalyptic number.

It is an amenable number.

2768679649 is a deficient number, since it is larger than the sum of its proper divisors (156387).

2768679649 is a wasteful number, since it uses less digits than its factorization.

2768679649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156386.

The product of its digits is 54867456, while the sum is 64.

The square root of 2768679649 is about 52618.2444500004. The cubic root of 2768679649 is about 1404.1846983973.

The spelling of 2768679649 in words is "two billion, seven hundred sixty-eight million, six hundred seventy-nine thousand, six hundred forty-nine".