1812534831640 has 64 divisors (see below), whose sum is σ = 4393096948800. Its totient is φ = 669062963712.

The previous prime is 1812534831623. The next prime is 1812534831683. The reversal of 1812534831640 is 461384352181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465254 + ... + 2402506.

It is an arithmetic number, because the mean of its divisors is an integer number (68642139825).

Almost surely, 2^{1812534831640} is an apocalyptic number.

1812534831640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1812534831640 is an abundant number, since it is smaller than the sum of its proper divisors (2580562117160).

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

1812534831640 is a wasteful number, since it uses less digits than its factorization.

1812534831640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940996 (or 940992 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 1812534831640 in words is "one trillion, eight hundred twelve billion, five hundred thirty-four million, eight hundred thirty-one thousand, six hundred forty".