1815853130500 has 48 divisors (see below), whose sum is σ = 3965970153600. Its totient is φ = 726314344800.

The previous prime is 1815853130489. The next prime is 1815853130503. The reversal of 1815853130500 is 50313585181.

It is not an unprimeable number, because it can be changed into a prime (1815853130503) by changing a digit.

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, 18640921 + ... + 18738079.

It is an arithmetic number, because the mean of its divisors is an integer number (82624378200).

Almost surely, 2^{1815853130500} is an apocalyptic number.

1815853130500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1815853130500 is an abundant number, since it is smaller than the sum of its proper divisors (2150117023100).

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

1815853130500 is a wasteful number, since it uses less digits than its factorization.

1815853130500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134557 (or 134545 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 1815853130500 in words is "one trillion, eight hundred fifteen billion, eight hundred fifty-three million, one hundred thirty thousand, five hundred".