1165507849800 has 864 divisors, whose sum is σ = 4674175833600. Its totient is φ = 264741073920.

The previous prime is 1165507849787. The next prime is 1165507849801. The reversal of 1165507849800 is 89487055611.

It is a happy number.

1165507849800 is a `hidden beast` number, since 1 + 1 + 6 + 550 + 7 + 8 + 4 + 9 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1165507849801) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 2048343916 + ... + 2048344484.

Almost surely, 2^{1165507849800} is an apocalyptic number.

1165507849800 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 1165507849800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2337087916800).

1165507849800 is an abundant number, since it is smaller than the sum of its proper divisors (3508667983800).

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

1165507849800 is an equidigital number, since it uses as much as digits as its factorization.

1165507849800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 1165507849800 in words is "one trillion, one hundred sixty-five billion, five hundred seven million, eight hundred forty-nine thousand, eight hundred".