5646328391 has 12 divisors (see below), whose sum is σ = 6420309000. Its totient is φ = 4956021840.

The previous prime is 5646328381. The next prime is 5646328393. The reversal of 5646328391 is 1938236465.

It is not a de Polignac number, because 5646328391 - 2²² = 5642134087 is a prime.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5646328393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801041 + ... + 808058.

It is an arithmetic number, because the mean of its divisors is an integer number (535025750).

Almost surely, 2^5646328391 is an apocalyptic number.

5646328391 is a deficient number, since it is larger than the sum of its proper divisors (773980609).

5646328391 is a wasteful number, since it uses less digits than its factorization.

5646328391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609150 (or 1609139 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 5646328391 is about 75142.0547429999. The cubic root of 5646328391 is about 1780.6916042229.

The spelling of 5646328391 in words is "five billion, six hundred forty-six million, three hundred twenty-eight thousand, three hundred ninety-one".