2811649863 has 16 divisors (see below), whose sum is σ = 4107542400. Its totient is φ = 1696584480.

The previous prime is 2811649861. The next prime is 2811649871. The reversal of 2811649863 is 3689461182.

It is not a de Polignac number, because 2811649863 - 2¹ = 2811649861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2811649861) 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 15 ways as a sum of consecutive naturals, for example, 178473 + ... + 193586.

It is an arithmetic number, because the mean of its divisors is an integer number (256721400).

Almost surely, 2^2811649863 is an apocalyptic number.

2811649863 is a deficient number, since it is larger than the sum of its proper divisors (1295892537).

2811649863 is a wasteful number, since it uses less digits than its factorization.

2811649863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372302.

The product of its digits is 497664, while the sum is 48.

The square root of 2811649863 is about 53024.9928147096. The cubic root of 2811649863 is about 1411.4118050697.

The spelling of 2811649863 in words is "two billion, eight hundred eleven million, six hundred forty-nine thousand, eight hundred sixty-three".