2644007364 has 18 divisors (see below), whose sum is σ = 6683463150. Its totient is φ = 881335776.

The previous prime is 2644007351. The next prime is 2644007371. The reversal of 2644007364 is 4637004462.

2644007364 is a `hidden beast` number, since 2 + 644 + 0 + 0 + 7 + 3 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2601000000 + 43007364 = 51000^2 + 6558^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 73444649 = 2644007364 / (2 + 6 + 4 + 4 + 0 + 0 + 7 + 3 + 6 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36722289 + ... + 36722360.

Almost surely, 2^2644007364 is an apocalyptic number.

It is an amenable number.

2644007364 is an abundant number, since it is smaller than the sum of its proper divisors (4039455786).

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

2644007364 is a wasteful number, since it uses less digits than its factorization.

2644007364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73444659 (or 73444654 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The square root of 2644007364 is about 51419.9121352808. The cubic root of 2644007364 is about 1382.7836000724.

The spelling of 2644007364 in words is "two billion, six hundred forty-four million, seven thousand, three hundred sixty-four".