2768969681 has 2 divisors, whose sum is σ = 2768969682. Its totient is φ = 2768969680.

The previous prime is 2768969659. The next prime is 2768969717. The reversal of 2768969681 is 1869698672.

2768969681 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., 2518032400 + 250937281 = 50180^2 + 15841^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768969681 - 2²⁶ = 2701860817 is a prime.

It is a super-2 number, since 2×2768969681² = 15334386188594483522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2768969881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384484840 + 1384484841.

It is an arithmetic number, because the mean of its divisors is an integer number (1384484841).

Almost surely, 2^2768969681 is an apocalyptic number.

It is an amenable number.

2768969681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2768969681 is an equidigital number, since it uses as much as digits as its factorization.

2768969681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 62.

The square root of 2768969681 is about 52621.0003800764. Note that the first 3 decimals coincide. The cubic root of 2768969681 is about 1404.2337282994.

The spelling of 2768969681 in words is "two billion, seven hundred sixty-eight million, nine hundred sixty-nine thousand, six hundred eighty-one".