1161644216 has 16 divisors (see below), whose sum is σ = 2198440440. Its totient is φ = 575393440.

The previous prime is 1161644189. The next prime is 1161644219. The reversal of 1161644216 is 6124461611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161644219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677675 + ... + 679386.

Almost surely, 2^1161644216 is an apocalyptic number.

It is an amenable number.

1161644216 is a deficient number, since it is larger than the sum of its proper divisors (1036796224).

1161644216 is a wasteful number, since it uses less digits than its factorization.

1161644216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357174 (or 1357170 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 1161644216 is about 34082.9021064815. The cubic root of 1161644216 is about 1051.2137788196.

The spelling of 1161644216 in words is "one billion, one hundred sixty-one million, six hundred forty-four thousand, two hundred sixteen".