2779245081 has 16 divisors (see below), whose sum is σ = 4118524800. Its totient is φ = 1852323984.

The previous prime is 2779245061. The next prime is 2779245109. The reversal of 2779245081 is 1805429772.

It is a happy number.

It is not a de Polignac number, because 2779245081 - 2¹⁵ = 2779212313 is a prime.

It is a super-2 number, since 2×2779245081² = 15448406440525393122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2779245061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104935 + ... + 128723.

It is an arithmetic number, because the mean of its divisors is an integer number (257407800).

Almost surely, 2^2779245081 is an apocalyptic number.

It is an amenable number.

2779245081 is a deficient number, since it is larger than the sum of its proper divisors (1339279719).

2779245081 is a wasteful number, since it uses less digits than its factorization.

2779245081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28125 (or 28119 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 2779245081 is about 52718.5458923138. The cubic root of 2779245081 is about 1405.9685795611.

The spelling of 2779245081 in words is "two billion, seven hundred seventy-nine million, two hundred forty-five thousand, eighty-one".