1816111674 has 48 divisors (see below), whose sum is σ = 4317577992. Its totient is φ = 548256384.

The previous prime is 1816111667. The next prime is 1816111691. The reversal of 1816111674 is 4761116181.

It can be written as a sum of positive squares in 4 ways, for example, as 1663416225 + 152695449 = 40785^2 + 12357^2 .

It is a super-2 number, since 2×1816111674² = 6596523224878164552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60817 + ... + 85620.

Almost surely, 2^1816111674 is an apocalyptic number.

1816111674 is an abundant number, since it is smaller than the sum of its proper divisors (2501466318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816111674 is a wasteful number, since it uses less digits than its factorization.

1816111674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146511 (or 146508 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1816111674 is about 42615.8617653099. The cubic root of 1816111674 is about 1220.0590480244.

The spelling of 1816111674 in words is "one billion, eight hundred sixteen million, one hundred eleven thousand, six hundred seventy-four".