1646326423 has 16 divisors (see below), whose sum is σ = 1972244736. Its totient is φ = 1344692160.

The previous prime is 1646326417. The next prime is 1646326447. The reversal of 1646326423 is 3246236461.

It is a happy number.

It is not a de Polignac number, because 1646326423 - 2⁵ = 1646326391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646326463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54361 + ... + 79042.

It is an arithmetic number, because the mean of its divisors is an integer number (123265296).

Almost surely, 2^1646326423 is an apocalyptic number.

1646326423 is a deficient number, since it is larger than the sum of its proper divisors (325918313).

1646326423 is a wasteful number, since it uses less digits than its factorization.

1646326423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133494.

The product of its digits is 124416, while the sum is 37.

The square root of 1646326423 is about 40574.9482193138. The cubic root of 1646326423 is about 1180.7881412383.

The spelling of 1646326423 in words is "one billion, six hundred forty-six million, three hundred twenty-six thousand, four hundred twenty-three".