2261078779 has 16 divisors (see below), whose sum is σ = 2393395200. Its totient is φ = 2135759208.

The previous prime is 2261078767. The next prime is 2261078789. The reversal of 2261078779 is 9778701622.

It is not a de Polignac number, because 2261078779 - 2⁵ = 2261078747 is a prime.

It is a super-2 number, since 2×2261078779² = 10224954489688261682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261078749) 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, 1008742 + ... + 1010980.

It is an arithmetic number, because the mean of its divisors is an integer number (149587200).

Almost surely, 2^2261078779 is an apocalyptic number.

2261078779 is a deficient number, since it is larger than the sum of its proper divisors (132316421).

2261078779 is an frugal number, since it uses more digits than its factorization.

2261078779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 2261078779 is about 47550.8020857693. The cubic root of 2261078779 is about 1312.5178889656.

The spelling of 2261078779 in words is "two billion, two hundred sixty-one million, seventy-eight thousand, seven hundred seventy-nine".