1866227289900 has 36 divisors (see below), whose sum is σ = 5399617626312. Its totient is φ = 497660610560.

The previous prime is 1866227289833. The next prime is 1866227289923. The reversal of 1866227289900 is 99827226681.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 11 ways as a sum of consecutive naturals, for example, 3110378517 + ... + 3110379116.

Almost surely, 2^{1866227289900} is an apocalyptic number.

1866227289900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1866227289900 is an abundant number, since it is smaller than the sum of its proper divisors (3533390336412).

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

1866227289900 is a wasteful number, since it uses less digits than its factorization.

1866227289900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220757650 (or 6220757643 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 1866227289900 in words is "one trillion, eight hundred sixty-six billion, two hundred twenty-seven million, two hundred eighty-nine thousand, nine hundred".