2781973045 has 16 divisors (see below), whose sum is σ = 3456549360. Its totient is φ = 2146927104.

The previous prime is 2781973043. The next prime is 2781973067. The reversal of 2781973045 is 5403791872.

It can be written as a sum of positive squares in 8 ways, for example, as 43125489 + 2738847556 = 6567^2 + 52334^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781973045 - 2¹ = 2781973043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2781972986 and 2781973004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781973043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167977 + ... + 183793.

It is an arithmetic number, because the mean of its divisors is an integer number (216034335).

Almost surely, 2^2781973045 is an apocalyptic number.

It is an amenable number.

2781973045 is a deficient number, since it is larger than the sum of its proper divisors (674576315).

2781973045 is a wasteful number, since it uses less digits than its factorization.

2781973045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17064.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 2781973045 is about 52744.4124528845. The cubic root of 2781973045 is about 1406.4284379465.

The spelling of 2781973045 in words is "two billion, seven hundred eighty-one million, nine hundred seventy-three thousand, forty-five".