1191420694800 has 480 divisors, whose sum is σ = 4925839368960. Its totient is φ = 267859353600.

The previous prime is 1191420694769. The next prime is 1191420694819. The reversal of 1191420694800 is 84960241911.

It is a happy number.

1191420694800 is a `hidden beast` number, since 1 + 1 + 91 + 4 + 20 + 69 + 480 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4482424 + ... + 4740776.

It is an arithmetic number, because the mean of its divisors is an integer number (10262165352).

Almost surely, 2^{1191420694800} is an apocalyptic number.

1191420694800 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 1191420694800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2462919684480).

1191420694800 is an abundant number, since it is smaller than the sum of its proper divisors (3734418674160).

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

1191420694800 is a wasteful number, since it uses less digits than its factorization.

1191420694800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258448 (or 258431 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 1191420694800 in words is "one trillion, one hundred ninety-one billion, four hundred twenty million, six hundred ninety-four thousand, eight hundred".