2731944645 has 32 divisors (see below), whose sum is σ = 4863075840. Its totient is φ = 1455151680.

The previous prime is 2731944643. The next prime is 2731944667. The reversal of 2731944645 is 5464491372.

It is not a de Polignac number, because 2731944645 - 2¹ = 2731944643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2731944645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731944643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94900 + ... + 120290.

It is an arithmetic number, because the mean of its divisors is an integer number (151971120).

Almost surely, 2^2731944645 is an apocalyptic number.

It is an amenable number.

2731944645 is a deficient number, since it is larger than the sum of its proper divisors (2131131195).

2731944645 is a wasteful number, since it uses less digits than its factorization.

2731944645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26202 (or 26196 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 2731944645 is about 52268.0078537531. The cubic root of 2731944645 is about 1397.9467597474.

It can be divided in two parts, 2731 and 944645, that added together give a triangular number (947376 = T₁₃₇₆).

The spelling of 2731944645 in words is "two billion, seven hundred thirty-one million, nine hundred forty-four thousand, six hundred forty-five".