1161606500 has 24 divisors (see below), whose sum is σ = 2536949688. Its totient is φ = 464642400.

The previous prime is 1161606493. The next prime is 1161606503. The reversal of 1161606500 is 56061611.

It can be written as a sum of positive squares in 4 ways, for example, as 351862564 + 809743936 = 18758^2 + 28456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1161606500.

It is not an unprimeable number, because it can be changed into a prime (1161606503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161107 + ... + 1162106.

It is an arithmetic number, because the mean of its divisors is an integer number (105706237).

Almost surely, 2^1161606500 is an apocalyptic number.

1161606500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161606500 is an abundant number, since it is smaller than the sum of its proper divisors (1375343188).

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

1161606500 is a wasteful number, since it uses less digits than its factorization.

1161606500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323232 (or 2323220 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1161606500 is about 34082.3488040364. The cubic root of 1161606500 is about 1051.2024018399.

The spelling of 1161606500 in words is "one billion, one hundred sixty-one million, six hundred six thousand, five hundred".