774491818 has 4 divisors (see below), whose sum is σ = 1161737730. Its totient is φ = 387245908.

The previous prime is 774491789. The next prime is 774491827. The reversal of 774491818 is 818194477.

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., 504316849 + 270174969 = 22457^2 + 16437^2 .

It is a super-2 number, since 2×774491818² = 1199675152297890248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193622953 + ... + 193622956.

Almost surely, 2^774491818 is an apocalyptic number.

774491818 is a deficient number, since it is larger than the sum of its proper divisors (387245912).

774491818 is a wasteful number, since it uses less digits than its factorization.

774491818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387245911.

The product of its digits is 451584, while the sum is 49.

The square root of 774491818 is about 27829.6930992780. The cubic root of 774491818 is about 918.3444620009.

The spelling of 774491818 in words is "seven hundred seventy-four million, four hundred ninety-one thousand, eight hundred eighteen".