1209834961800 has 192 divisors, whose sum is σ = 3923711366400. Its totient is φ = 308056627200.

The previous prime is 1209834961747. The next prime is 1209834961849. The reversal of 1209834961800 is 81694389021.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 633006 + ... + 1679394.

It is an arithmetic number, because the mean of its divisors is an integer number (20435996700).

Almost surely, 2^{1209834961800} is an apocalyptic number.

1209834961800 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 1209834961800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1961855683200).

1209834961800 is an abundant number, since it is smaller than the sum of its proper divisors (2713876404600).

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

1209834961800 is a wasteful number, since it uses less digits than its factorization.

1209834961800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046496 (or 1046487 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 1209834961800 in words is "one trillion, two hundred nine billion, eight hundred thirty-four million, nine hundred sixty-one thousand, eight hundred".