2182774864 has 20 divisors (see below), whose sum is σ = 4236960340. Its totient is φ = 1089365760.

The previous prime is 2182774861. The next prime is 2182774873. The reversal of 2182774864 is 4684772812.

It can be written as a sum of positive squares in 2 ways, for example, as 388405264 + 1794369600 = 19708^2 + 42360^2 .

It is a super-2 number, since 2×2182774864² = 9529012213820436992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2182774861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117429 + ... + 134740.

It is an arithmetic number, because the mean of its divisors is an integer number (211848017).

Almost surely, 2^2182774864 is an apocalyptic number.

It is an amenable number.

2182774864 is a deficient number, since it is larger than the sum of its proper divisors (2054185476).

2182774864 is a wasteful number, since it uses less digits than its factorization.

2182774864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252718 (or 252712 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 49.

The square root of 2182774864 is about 46720.1761982979. The cubic root of 2182774864 is about 1297.1881758276.

The spelling of 2182774864 in words is "two billion, one hundred eighty-two million, seven hundred seventy-four thousand, eight hundred sixty-four".