2649668784 has 40 divisors (see below), whose sum is σ = 7822832640. Its totient is φ = 757048128.

The previous prime is 2649668783. The next prime is 2649668789. The reversal of 2649668784 is 4878669462.

It is not an unprimeable number, because it can be changed into a prime (2649668783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3942624 + ... + 3943295.

It is an arithmetic number, because the mean of its divisors is an integer number (195570816).

Almost surely, 2^2649668784 is an apocalyptic number.

2649668784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2649668784 is an abundant number, since it is smaller than the sum of its proper divisors (5173163856).

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

2649668784 is a wasteful number, since it uses less digits than its factorization.

2649668784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885937 (or 7885931 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The square root of 2649668784 is about 51474.9335502242. The cubic root of 2649668784 is about 1383.7698476812.

The spelling of 2649668784 in words is "two billion, six hundred forty-nine million, six hundred sixty-eight thousand, seven hundred eighty-four".