1199427989760 has 3240 divisors, whose sum is σ = 5943943627776. Its totient is φ = 228248616960.

The previous prime is 1199427989701. The next prime is 1199427989797. The reversal of 1199427989760 is 679897249911.

1199427989760 is a `hidden beast` number, since 1 + 199 + 427 + 9 + 8 + 9 + 7 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3240).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 9444314817 + ... + 9444314943.

Almost surely, 2^{1199427989760} is an apocalyptic number.

1199427989760 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 1199427989760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2971971813888).

1199427989760 is an abundant number, since it is smaller than the sum of its proper divisors (4744515638016).

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

1199427989760 is a wasteful number, since it uses less digits than its factorization.

1199427989760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 72.

The spelling of 1199427989760 in words is "one trillion, one hundred ninety-nine billion, four hundred twenty-seven million, nine hundred eighty-nine thousand, seven hundred sixty".