2780643085 has 16 divisors (see below), whose sum is σ = 3643719552. Its totient is φ = 2020283200.

The previous prime is 2780643079. The next prime is 2780643139. The reversal of 2780643085 is 5803460872.

It is not a de Polignac number, because 2780643085 - 2¹¹ = 2780641037 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 32187 + ... + 81223.

It is an arithmetic number, because the mean of its divisors is an integer number (227732472).

Almost surely, 2^2780643085 is an apocalyptic number.

It is an amenable number.

2780643085 is a deficient number, since it is larger than the sum of its proper divisors (863076467).

2780643085 is a wasteful number, since it uses less digits than its factorization.

2780643085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50084.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 2780643085 is about 52731.8033543326. The cubic root of 2780643085 is about 1406.2042814832.

The spelling of 2780643085 in words is "two billion, seven hundred eighty million, six hundred forty-three thousand, eighty-five".