1161643444 has 24 divisors (see below), whose sum is σ = 2198917728. Its totient is φ = 533775840.

The previous prime is 1161643429. The next prime is 1161643477. The reversal of 1161643444 is 4443461611.

It is a super-2 number, since 2×1161643444² = 2698830981976362272, which contains 22 as substring.

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, 37402 + ... + 61009.

It is an arithmetic number, because the mean of its divisors is an integer number (91621572).

Almost surely, 2^1161643444 is an apocalyptic number.

It is an amenable number.

1161643444 is a deficient number, since it is larger than the sum of its proper divisors (1037274284).

1161643444 is a wasteful number, since it uses less digits than its factorization.

1161643444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98655 (or 98653 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 1161643444 is about 34082.8907811529. The cubic root of 1161643444 is about 1051.2135459493.

The spelling of 1161643444 in words is "one billion, one hundred sixty-one million, six hundred forty-three thousand, four hundred forty-four".