1831516216812 has 48 divisors (see below), whose sum is σ = 4813421635680. Its totient is φ = 602142315264.

The previous prime is 1831516216811. The next prime is 1831516216843. The reversal of 1831516216812 is 2186126151381.

1831516216812 is a `hidden beast` number, since 1 + 8 + 3 + 1 + 5 + 1 + 621 + 6 + 8 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (1831516216811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116146113 + ... + 116161880.

It is an arithmetic number, because the mean of its divisors is an integer number (100279617410).

Almost surely, 2^{1831516216812} is an apocalyptic number.

1831516216812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1831516216812 is an abundant number, since it is smaller than the sum of its proper divisors (2981905418868).

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

1831516216812 is a wasteful number, since it uses less digits than its factorization.

1831516216812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232308079 (or 232308071 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The spelling of 1831516216812 in words is "one trillion, eight hundred thirty-one billion, five hundred sixteen million, two hundred sixteen thousand, eight hundred twelve".