1161549444 has 24 divisors (see below), whose sum is σ = 2956671648. Its totient is φ = 351984640.

The previous prime is 1161549407. The next prime is 1161549449. The reversal of 1161549444 is 4449451611.

It is a super-2 number, since 2×1161549444² = 2698394221713418272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161549449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4399677 + ... + 4399940.

It is an arithmetic number, because the mean of its divisors is an integer number (123194652).

Almost surely, 2^1161549444 is an apocalyptic number.

It is an amenable number.

1161549444 is an abundant number, since it is smaller than the sum of its proper divisors (1795122204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161549444 is a wasteful number, since it uses less digits than its factorization.

1161549444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799635 (or 8799633 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 1161549444 is about 34081.5117622444. The cubic root of 1161549444 is about 1051.1851905077.

The spelling of 1161549444 in words is "one billion, one hundred sixty-one million, five hundred forty-nine thousand, four hundred forty-four".