1161559444 has 6 divisors (see below), whose sum is σ = 2032729034. Its totient is φ = 580779720.

The previous prime is 1161559439. The next prime is 1161559447. The reversal of 1161559444 is 4449551611.

It can be written as a sum of positive squares in only one way, i.e., 1103036944 + 58522500 = 33212^2 + 7650^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161559397 and 1161559406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161559447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145194927 + ... + 145194934.

Almost surely, 2^1161559444 is an apocalyptic number.

It is an amenable number.

1161559444 is a deficient number, since it is larger than the sum of its proper divisors (871169590).

1161559444 is a wasteful number, since it uses less digits than its factorization.

1161559444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290389865 (or 290389863 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 1161559444 is about 34081.6584690358. The cubic root of 1161559444 is about 1051.1882071167.

The spelling of 1161559444 in words is "one billion, one hundred sixty-one million, five hundred fifty-nine thousand, four hundred forty-four".