2781321058 has 4 divisors (see below), whose sum is σ = 4171981590. Its totient is φ = 1390660528.

The previous prime is 2781321041. The next prime is 2781321073. The reversal of 2781321058 is 8501231872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2775498489 + 5822569 = 52683^2 + 2413^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695330263 + ... + 695330266.

Almost surely, 2^2781321058 is an apocalyptic number.

2781321058 is a deficient number, since it is larger than the sum of its proper divisors (1390660532).

2781321058 is a wasteful number, since it uses less digits than its factorization.

2781321058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390660531.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 2781321058 is about 52738.2314644699. The cubic root of 2781321058 is about 1406.3185585328.

The spelling of 2781321058 in words is "two billion, seven hundred eighty-one million, three hundred twenty-one thousand, fifty-eight".