4494187778 has 8 divisors (see below), whose sum is σ = 6741609420. Its totient is φ = 2246984640.

The previous prime is 4494187759. The next prime is 4494187793. The reversal of 4494187778 is 8777814944.

It can be written as a sum of positive squares in 2 ways, for example, as 4453827169 + 40360609 = 66737^2 + 6353^2 .

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, 14078 + ... + 95846.

Almost surely, 2^4494187778 is an apocalyptic number.

4494187778 is a deficient number, since it is larger than the sum of its proper divisors (2247421642).

4494187778 is a wasteful number, since it uses less digits than its factorization.

4494187778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109252.

The product of its digits is 12644352, while the sum is 59.

The square root of 4494187778 is about 67038.7035823337. The cubic root of 4494187778 is about 1650.2525206414.

The spelling of 4494187778 in words is "four billion, four hundred ninety-four million, one hundred eighty-seven thousand, seven hundred seventy-eight".