1161623644 has 12 divisors (see below), whose sum is σ = 2082423168. Its totient is φ = 566645600.

The previous prime is 1161623633. The next prime is 1161623677. The reversal of 1161623644 is 4463261611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3541372 + ... + 3541699.

It is an arithmetic number, because the mean of its divisors is an integer number (173535264).

Almost surely, 2^1161623644 is an apocalyptic number.

It is an amenable number.

1161623644 is a deficient number, since it is larger than the sum of its proper divisors (920799524).

1161623644 is a wasteful number, since it uses less digits than its factorization.

1161623644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083116 (or 7083114 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 1161623644 is about 34082.6003115959. The cubic root of 1161623644 is about 1051.2075733345.

The spelling of 1161623644 in words is "one billion, one hundred sixty-one million, six hundred twenty-three thousand, six hundred forty-four".