1165331500000 has 84 divisors (see below), whose sum is σ = 2867772510792. Its totient is φ = 466132400000.

The previous prime is 1165331499973. The next prime is 1165331500001. The reversal of 1165331500000 is 51335611.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165331500001) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 665332 + ... + 1665331.

It is an arithmetic number, because the mean of its divisors is an integer number (34140148938).

Almost surely, 2^{1165331500000} is an apocalyptic number.

1165331500000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165331500000 is an abundant number, since it is smaller than the sum of its proper divisors (1702441010792).

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

1165331500000 is an frugal number, since it uses more digits than its factorization.

1165331500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330703 (or 2330670 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

Adding to 1165331500000 its reverse (51335611), we get a palindrome (1165382835611).

The spelling of 1165331500000 in words is "one trillion, one hundred sixty-five billion, three hundred thirty-one million, five hundred thousand".