1918099665900 has 216 divisors, whose sum is σ = 6559985852784. Its totient is φ = 464905420800.

The previous prime is 1918099665851. The next prime is 1918099665917. The reversal of 1918099665900 is 95669908191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62879452 + ... + 62909948.

It is an arithmetic number, because the mean of its divisors is an integer number (30370304874).

Almost surely, 2^{1918099665900} is an apocalyptic number.

1918099665900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918099665900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3279992926392).

1918099665900 is an abundant number, since it is smaller than the sum of its proper divisors (4641886186884).

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

1918099665900 is a wasteful number, since it uses less digits than its factorization.

1918099665900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36881 (or 36871 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The spelling of 1918099665900 in words is "one trillion, nine hundred eighteen billion, ninety-nine million, six hundred sixty-five thousand, nine hundred".