2643562044 has 18 divisors (see below), whose sum is σ = 6682337480. Its totient is φ = 881187336.

The previous prime is 2643562021. The next prime is 2643562057. The reversal of 2643562044 is 4402653462.

2643562044 is a `hidden beast` number, since 2 + 643 + 5 + 6 + 2 + 0 + 4 + 4 = 666.

2643562044 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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: 73432279 = 2643562044 / (2 + 6 + 4 + 3 + 5 + 6 + 2 + 0 + 4 + 4).

It is a congruent number.

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, 36716104 + ... + 36716175.

Almost surely, 2^2643562044 is an apocalyptic number.

It is an amenable number.

2643562044 is an abundant number, since it is smaller than the sum of its proper divisors (4038775436).

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

2643562044 is a wasteful number, since it uses less digits than its factorization.

2643562044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73432289 (or 73432284 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The square root of 2643562044 is about 51415.5817238315. The cubic root of 2643562044 is about 1382.7059634043.

The spelling of 2643562044 in words is "two billion, six hundred forty-three million, five hundred sixty-two thousand, forty-four".