1816530151806 has 96 divisors (see below), whose sum is σ = 4030580736000. Its totient is φ = 591003878400.

The previous prime is 1816530151739. The next prime is 1816530151939. The reversal of 1816530151806 is 6081510356181.

It is a happy number.

1816530151806 is a `hidden beast` number, since 1 + 8 + 165 + 301 + 5 + 180 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 811312035 + ... + 811314273.

It is an arithmetic number, because the mean of its divisors is an integer number (41985216000).

Almost surely, 2^{1816530151806} is an apocalyptic number.

1816530151806 is an abundant number, since it is smaller than the sum of its proper divisors (2214050584194).

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

1816530151806 is a wasteful number, since it uses less digits than its factorization.

1816530151806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4494 (or 4491 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 1816530151806 in words is "one trillion, eight hundred sixteen billion, five hundred thirty million, one hundred fifty-one thousand, eight hundred six".