1866271373900 has 18 divisors (see below), whose sum is σ = 4049808881580. Its totient is φ = 746508549520.

The previous prime is 1866271373899. The next prime is 1866271373909. The reversal of 1866271373900 is 93731726681.

It is not an unprimeable number, because it can be changed into a prime (1866271373909) 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 5 ways as a sum of consecutive naturals, for example, 9331356770 + ... + 9331356969.

It is an arithmetic number, because the mean of its divisors is an integer number (224989382310).

Almost surely, 2^{1866271373900} is an apocalyptic number.

1866271373900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1866271373900 is an abundant number, since it is smaller than the sum of its proper divisors (2183537507680).

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

1866271373900 is a wasteful number, since it uses less digits than its factorization.

1866271373900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18662713753 (or 18662713746 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 1866271373900 in words is "one trillion, eight hundred sixty-six billion, two hundred seventy-one million, three hundred seventy-three thousand, nine hundred".