1188396447744 has 192 divisors, whose sum is σ = 3549730504320. Its totient is φ = 350386421760.

The previous prime is 1188396447709. The next prime is 1188396447767. The reversal of 1188396447744 is 4477446938811.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×1188396447744² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2262987 + ... + 2738229.

It is an arithmetic number, because the mean of its divisors is an integer number (18488179710).

Almost surely, 2^{1188396447744} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1188396447744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774865252160).

1188396447744 is an abundant number, since it is smaller than the sum of its proper divisors (2361334056576).

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

1188396447744 is a wasteful number, since it uses less digits than its factorization.

1188396447744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475316 (or 475296 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 66.

The spelling of 1188396447744 in words is "one trillion, one hundred eighty-eight billion, three hundred ninety-six million, four hundred forty-seven thousand, seven hundred forty-four".