2778365694 has 32 divisors (see below), whose sum is σ = 6059934720. Its totient is φ = 844058592.

The previous prime is 2778365683. The next prime is 2778365699. The reversal of 2778365694 is 4965638772.

It is a super-2 number, since 2×2778365694² = 15438631859192203272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778365699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219282 + ... + 231605.

It is an arithmetic number, because the mean of its divisors is an integer number (189372960).

Almost surely, 2^2778365694 is an apocalyptic number.

2778365694 is an abundant number, since it is smaller than the sum of its proper divisors (3281569026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2778365694 is a wasteful number, since it uses less digits than its factorization.

2778365694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450984.

The product of its digits is 15240960, while the sum is 57.

The square root of 2778365694 is about 52710.2048373937. The cubic root of 2778365694 is about 1405.8202753896.

The spelling of 2778365694 in words is "two billion, seven hundred seventy-eight million, three hundred sixty-five thousand, six hundred ninety-four".