2811079681 has 2 divisors, whose sum is σ = 2811079682. Its totient is φ = 2811079680.

The previous prime is 2811079657. The next prime is 2811079717. The reversal of 2811079681 is 1869701182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2508006400 + 303073281 = 50080^2 + 17409^2 .

It is a cyclic number.

It is not a de Polignac number, because 2811079681 - 2⁹ = 2811079169 is a prime.

It is a super-2 number, since 2×2811079681² = 15804337945862123522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2811079631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405539840 + 1405539841.

It is an arithmetic number, because the mean of its divisors is an integer number (1405539841).

Almost surely, 2^2811079681 is an apocalyptic number.

It is an amenable number.

2811079681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811079681 is an equidigital number, since it uses as much as digits as its factorization.

2811079681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 43.

The square root of 2811079681 is about 53019.6160020044. The cubic root of 2811079681 is about 1411.3163906273.

The spelling of 2811079681 in words is "two billion, eight hundred eleven million, seventy-nine thousand, six hundred eighty-one".