1161065650 has 24 divisors (see below), whose sum is σ = 2161619460. Its totient is φ = 463988160.

The previous prime is 1161065641. The next prime is 1161065651. The reversal of 1161065650 is 565601611.

It can be written as a sum of positive squares in 6 ways, for example, as 343620369 + 817445281 = 18537^2 + 28591^2 .

It is not an unprimeable number, because it can be changed into a prime (1161065651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45456 + ... + 66244.

Almost surely, 2^1161065650 is an apocalyptic number.

1161065650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161065650 is a deficient number, since it is larger than the sum of its proper divisors (1000553810).

1161065650 is a wasteful number, since it uses less digits than its factorization.

1161065650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21918 (or 21913 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1161065650 is about 34074.4134212168. The cubic root of 1161065650 is about 1051.0392280857.

The spelling of 1161065650 in words is "one billion, one hundred sixty-one million, sixty-five thousand, six hundred fifty".