1813539346788 has 72 divisors (see below), whose sum is σ = 4612891248000. Its totient is φ = 554266966656.

The previous prime is 1813539346783. The next prime is 1813539346807. The reversal of 1813539346788 is 8876439353181.

It is not an unprimeable number, because it can be changed into a prime (1813539346783) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2698668 + ... + 3303011.

It is an arithmetic number, because the mean of its divisors is an integer number (64067934000).

Almost surely, 2^{1813539346788} is an apocalyptic number.

It is an amenable number.

1813539346788 is an abundant number, since it is smaller than the sum of its proper divisors (2799351901212).

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

1813539346788 is a wasteful number, since it uses less digits than its factorization.

1813539346788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001861 (or 6001846 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 66.

The spelling of 1813539346788 in words is "one trillion, eight hundred thirteen billion, five hundred thirty-nine million, three hundred forty-six thousand, seven hundred eighty-eight".