2783684545 has 16 divisors (see below), whose sum is σ = 3468789072. Its totient is φ = 2142858240.

The previous prime is 2783684543. The next prime is 2783684551. The reversal of 2783684545 is 5454863872.

It can be written as a sum of positive squares in 8 ways, for example, as 692268721 + 2091415824 = 26311^2 + 45732^2 .

It is not a de Polignac number, because 2783684545 - 2¹ = 2783684543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2783684492 and 2783684501.

It is not an unprimeable number, because it can be changed into a prime (2783684543) 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, 78042 + ... + 107971.

It is an arithmetic number, because the mean of its divisors is an integer number (216799317).

Almost surely, 2^2783684545 is an apocalyptic number.

It is an amenable number.

2783684545 is a deficient number, since it is larger than the sum of its proper divisors (685104527).

2783684545 is a wasteful number, since it uses less digits than its factorization.

2783684545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186132.

The product of its digits is 6451200, while the sum is 52.

The square root of 2783684545 is about 52760.6344256776. The cubic root of 2783684545 is about 1406.7167954990.

The spelling of 2783684545 in words is "two billion, seven hundred eighty-three million, six hundred eighty-four thousand, five hundred forty-five".