1165545472 has 208 divisors, whose sum is σ = 2972350080. Its totient is φ = 444727296.

The previous prime is 1165545457. The next prime is 1165545509. The reversal of 1165545472 is 2745455611.

It is a tau number, because it is divible by the number of its divisors (208).

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, 19754979 + ... + 19755037.

Almost surely, 2^1165545472 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 1165545472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486175040).

1165545472 is an abundant number, since it is smaller than the sum of its proper divisors (1806804608).

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

1165545472 is an equidigital number, since it uses as much as digits as its factorization.

1165545472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 134 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 1165545472 is about 34140.0859987200. The cubic root of 1165545472 is about 1052.3892596798.

The spelling of 1165545472 in words is "one billion, one hundred sixty-five million, five hundred forty-five thousand, four hundred seventy-two".