2811485644 has 24 divisors (see below), whose sum is σ = 5373849600. Its totient is φ = 1276408080.

The previous prime is 2811485639. The next prime is 2811485659. The reversal of 2811485644 is 4465841182.

It is a self number, because there is not a number n which added to its sum of digits gives 2811485644.

It is an unprimeable number.

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, 1164 + ... + 74995.

It is an arithmetic number, because the mean of its divisors is an integer number (223910400).

Almost surely, 2^2811485644 is an apocalyptic number.

It is an amenable number.

2811485644 is a deficient number, since it is larger than the sum of its proper divisors (2562363956).

2811485644 is a wasteful number, since it uses less digits than its factorization.

2811485644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77013 (or 77011 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 2811485644 is about 53023.4442864663. Note that the first 3 decimals coincide. The cubic root of 2811485644 is about 1411.3843259312.

The spelling of 2811485644 in words is "two billion, eight hundred eleven million, four hundred eighty-five thousand, six hundred forty-four".