1611432321 has 8 divisors (see below), whose sum is σ = 2160447744. Its totient is φ = 1068352560.

The previous prime is 1611432311. The next prime is 1611432323. The reversal of 1611432321 is 1232341161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1611432321 - 2⁵ = 1611432289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1611432291 and 1611432300.

It is not an unprimeable number, because it can be changed into a prime (1611432323) 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, 1483281 + ... + 1484366.

It is an arithmetic number, because the mean of its divisors is an integer number (270055968).

Almost surely, 2^1611432321 is an apocalyptic number.

It is an amenable number.

1611432321 is a deficient number, since it is larger than the sum of its proper divisors (549015423).

1611432321 is a wasteful number, since it uses less digits than its factorization.

1611432321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967831.

The product of its digits is 864, while the sum is 24.

The square root of 1611432321 is about 40142.6496509635. The cubic root of 1611432321 is about 1172.3861791697.

Adding to 1611432321 its reverse (1232341161), we get a palindrome (2843773482).

The spelling of 1611432321 in words is "one billion, six hundred eleven million, four hundred thirty-two thousand, three hundred twenty-one".