1156689644 has 24 divisors (see below), whose sum is σ = 2209325328. Its totient is φ = 525506240.

The previous prime is 1156689643. The next prime is 1156689647. The reversal of 1156689644 is 4469866511.

It is a junction number, because it is equal to n+sod(n) for n = 1156689592 and 1156689601.

It is not an unprimeable number, because it can be changed into a prime (1156689641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103682 + ... + 114294.

It is an arithmetic number, because the mean of its divisors is an integer number (92055222).

Almost surely, 2^1156689644 is an apocalyptic number.

It is an amenable number.

1156689644 is a deficient number, since it is larger than the sum of its proper divisors (1052635684).

1156689644 is a wasteful number, since it uses less digits than its factorization.

1156689644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13105 (or 13103 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 1156689644 is about 34010.1403113836. The cubic root of 1156689644 is about 1049.7171253109.

The spelling of 1156689644 in words is "one billion, one hundred fifty-six million, six hundred eighty-nine thousand, six hundred forty-four".