1163205036 has 144 divisors (see below), whose sum is σ = 3636831744. Its totient is φ = 317851776.

The previous prime is 1163204963. The next prime is 1163205041. The reversal of 1163205036 is 6305023611.

It is a super-2 number, since 2×1163205036² = 2706091911551522592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152776 + ... + 160208.

It is an arithmetic number, because the mean of its divisors is an integer number (25255776).

Almost surely, 2^1163205036 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 1163205036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818415872).

1163205036 is an abundant number, since it is smaller than the sum of its proper divisors (2473626708).

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

1163205036 is a wasteful number, since it uses less digits than its factorization.

1163205036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7482 (or 7468 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1163205036 is about 34105.7918248499. The cubic root of 1163205036 is about 1051.6843822280.

Adding to 1163205036 its reverse (6305023611), we get a palindrome (7468228647).

The spelling of 1163205036 in words is "one billion, one hundred sixty-three million, two hundred five thousand, thirty-six".