2778233564 has 12 divisors (see below), whose sum is σ = 4870641384. Its totient is φ = 1386621744.

The previous prime is 2778233539. The next prime is 2778233567. The reversal of 2778233564 is 4653328772.

It is a super-2 number, since 2×2778233564² = 15437163472272284192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778233567) 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 3 ways as a sum of consecutive naturals, for example, 621254 + ... + 625709.

It is an arithmetic number, because the mean of its divisors is an integer number (405886782).

Almost surely, 2^2778233564 is an apocalyptic number.

It is an amenable number.

2778233564 is a deficient number, since it is larger than the sum of its proper divisors (2092407820).

2778233564 is a wasteful number, since it uses less digits than its factorization.

2778233564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247524 (or 1247522 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 47.

The square root of 2778233564 is about 52708.9514598801. The cubic root of 2778233564 is about 1405.7979896291.

The spelling of 2778233564 in words is "two billion, seven hundred seventy-eight million, two hundred thirty-three thousand, five hundred sixty-four".