1161011636 has 24 divisors (see below), whose sum is σ = 2127172320. Its totient is φ = 553730912.

The previous prime is 1161011623. The next prime is 1161011689. The reversal of 1161011636 is 6361101611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50666 + ... + 69921.

It is an arithmetic number, because the mean of its divisors is an integer number (88632180).

Almost surely, 2^1161011636 is an apocalyptic number.

It is an amenable number.

1161011636 is a deficient number, since it is larger than the sum of its proper divisors (966160684).

1161011636 is a wasteful number, since it uses less digits than its factorization.

1161011636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120703 (or 120701 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1161011636 is about 34073.6208231529. The cubic root of 1161011636 is about 1051.0229293480.

The spelling of 1161011636 in words is "one billion, one hundred sixty-one million, eleven thousand, six hundred thirty-six".