1813779356 has 24 divisors (see below), whose sum is σ = 3374620704. Its totient is φ = 851090240.

The previous prime is 1813779353. The next prime is 1813779467. The reversal of 1813779356 is 6539773181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813779353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181115 + ... + 190866.

It is an arithmetic number, because the mean of its divisors is an integer number (140609196).

Almost surely, 2^1813779356 is an apocalyptic number.

It is an amenable number.

1813779356 is a deficient number, since it is larger than the sum of its proper divisors (1560841348).

1813779356 is a wasteful number, since it uses less digits than its factorization.

1813779356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372061 (or 372059 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 1813779356 is about 42588.4885385711. The cubic root of 1813779356 is about 1219.5365425867.

The spelling of 1813779356 in words is "one billion, eight hundred thirteen million, seven hundred seventy-nine thousand, three hundred fifty-six".