2768491657 has 8 divisors (see below), whose sum is σ = 2813604992. Its totient is φ = 2723490000.

The previous prime is 2768491651. The next prime is 2768491679. The reversal of 2768491657 is 7561948672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2768491657 - 2³¹ = 621008009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2768491598 and 2768491607.

It is not an unprimeable number, because it can be changed into a prime (2768491651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22807 + ... + 77827.

It is an arithmetic number, because the mean of its divisors is an integer number (351700624).

Almost surely, 2^2768491657 is an apocalyptic number.

It is an amenable number.

2768491657 is a deficient number, since it is larger than the sum of its proper divisors (45113335).

2768491657 is an equidigital number, since it uses as much as digits as its factorization.

2768491657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55839.

The product of its digits is 5080320, while the sum is 55.

The square root of 2768491657 is about 52616.4580430876. The cubic root of 2768491657 is about 1404.1529165255.

The spelling of 2768491657 in words is "two billion, seven hundred sixty-eight million, four hundred ninety-one thousand, six hundred fifty-seven".