1165501613056 has 99 divisors (see below), whose sum is σ = 2561761302807. Its totient is φ = 529600727040.

The previous prime is 1165501613053. The next prime is 1165501613063. The reversal of 1165501613056 is 6503161055611.

The square root of 1165501613056 is 1079584.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×1165501613056² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1165501613053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 380012035 + ... + 380015101.

Almost surely, 2^{1165501613056} is an apocalyptic number.

1165501613056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1165501613056 is the 1079584-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1165501613056

1165501613056 is an abundant number, since it is smaller than the sum of its proper divisors (1396259689751).

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

1165501613056 is an frugal number, since it uses more digits than its factorization.

1165501613056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

Adding to 1165501613056 its reverse (6503161055611), we get a palindrome (7668662668667).

The spelling of 1165501613056 in words is "one trillion, one hundred sixty-five billion, five hundred one million, six hundred thirteen thousand, fifty-six".