1161644326 has 4 divisors (see below), whose sum is σ = 1742466492. Its totient is φ = 580822162.

The previous prime is 1161644321. The next prime is 1161644353. The reversal of 1161644326 is 6234461611.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1161644291 and 1161644300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161644321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290411080 + ... + 290411083.

It is an arithmetic number, because the mean of its divisors is an integer number (435616623).

Almost surely, 2^1161644326 is an apocalyptic number.

1161644326 is a deficient number, since it is larger than the sum of its proper divisors (580822166).

1161644326 is an equidigital number, since it uses as much as digits as its factorization.

1161644326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580822165.

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

The square root of 1161644326 is about 34082.9037201938. The cubic root of 1161644326 is about 1051.2138120006.

The spelling of 1161644326 in words is "one billion, one hundred sixty-one million, six hundred forty-four thousand, three hundred twenty-six".