2781861486 has 16 divisors (see below), whose sum is σ = 5566624464. Its totient is φ = 926803584.

The previous prime is 2781861473. The next prime is 2781861529. The reversal of 2781861486 is 6841681872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108331 + ... + 131526.

It is an arithmetic number, because the mean of its divisors is an integer number (347914029).

Almost surely, 2^2781861486 is an apocalyptic number.

2781861486 is an abundant number, since it is smaller than the sum of its proper divisors (2784762978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2781861486 is a wasteful number, since it uses less digits than its factorization.

2781861486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241795.

The product of its digits is 1032192, while the sum is 51.

The square root of 2781861486 is about 52743.3548989823. The cubic root of 2781861486 is about 1406.4096381181.

The spelling of 2781861486 in words is "two billion, seven hundred eighty-one million, eight hundred sixty-one thousand, four hundred eighty-six".