5851221778 has 8 divisors (see below), whose sum is σ = 8867315772. Its totient is φ = 2895449856.

The previous prime is 5851221767. The next prime is 5851221791. The reversal of 5851221778 is 8771221585.

It can be written as a sum of positive squares in 2 ways, for example, as 5843532249 + 7689529 = 76443^2 + 2773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15080275 + ... + 15080662.

Almost surely, 2^5851221778 is an apocalyptic number.

5851221778 is a deficient number, since it is larger than the sum of its proper divisors (3016093994).

5851221778 is a wasteful number, since it uses less digits than its factorization.

5851221778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30161036.

The product of its digits is 313600, while the sum is 46.

The square root of 5851221778 is about 76493.2792995568. The cubic root of 5851221778 is about 1801.9753805349.

The spelling of 5851221778 in words is "five billion, eight hundred fifty-one million, two hundred twenty-one thousand, seven hundred seventy-eight".