1816450434 has 20 divisors (see below), whose sum is σ = 4070194854. Its totient is φ = 605483424.

The previous prime is 1816450411. The next prime is 1816450453. The reversal of 1816450434 is 4340546181.

1816450434 is a `hidden beast` number, since 1 + 8 + 1 + 645 + 0 + 4 + 3 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1814504409 + 1946025 = 42597^2 + 1395^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5606167 + ... + 5606490.

Almost surely, 2^1816450434 is an apocalyptic number.

1816450434 is an abundant number, since it is smaller than the sum of its proper divisors (2253744420).

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

1816450434 is a wasteful number, since it uses less digits than its factorization.

1816450434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11212671 (or 11212662 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1816450434 is about 42619.8361564190. The cubic root of 1816450434 is about 1220.1349026673.

The spelling of 1816450434 in words is "one billion, eight hundred sixteen million, four hundred fifty thousand, four hundred thirty-four".