1165999199040 has 560 divisors, whose sum is σ = 4533470548992. Its totient is φ = 282725904384.

The previous prime is 1165999198979. The next prime is 1165999199041. The reversal of 1165999199040 is 409919995611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165999199041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 22550497 + ... + 22602143.

Almost surely, 2^{1165999199040} is an apocalyptic number.

1165999199040 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 1165999199040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2266735274496).

1165999199040 is an abundant number, since it is smaller than the sum of its proper divisors (3367471349952).

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

1165999199040 is a wasteful number, since it uses less digits than its factorization.

1165999199040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51756 (or 51737 counting only the distinct ones).

The product of its (nonzero) digits is 7085880, while the sum is 63.

The spelling of 1165999199040 in words is "one trillion, one hundred sixty-five billion, nine hundred ninety-nine million, one hundred ninety-nine thousand, forty".