1818779612 has 48 divisors (see below), whose sum is σ = 3638017152. Its totient is φ = 788167680.

The previous prime is 1818779603. The next prime is 1818779623. The reversal of 1818779612 is 2169778181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405293 + ... + 409755.

It is an arithmetic number, because the mean of its divisors is an integer number (75792024).

Almost surely, 2^1818779612 is an apocalyptic number.

It is an amenable number.

1818779612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1818779612 is a wasteful number, since it uses less digits than its factorization.

1818779612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4958 (or 4956 counting only the distinct ones).

The product of its digits is 338688, while the sum is 50.

The square root of 1818779612 is about 42647.1524489033. The cubic root of 1818779612 is about 1220.6561936213.

The spelling of 1818779612 in words is "one billion, eight hundred eighteen million, seven hundred seventy-nine thousand, six hundred twelve".