646322073 has 8 divisors (see below), whose sum is σ = 882781536. Its totient is φ = 420372000.

The previous prime is 646322029. The next prime is 646322077. The reversal of 646322073 is 370223646.

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

It is not a de Polignac number, because 646322073 - 2⁶ = 646322009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646322077) 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, 2627203 + ... + 2627448.

It is an arithmetic number, because the mean of its divisors is an integer number (110347692).

Almost surely, 2^646322073 is an apocalyptic number.

It is an amenable number.

646322073 is a deficient number, since it is larger than the sum of its proper divisors (236459463).

646322073 is a wasteful number, since it uses less digits than its factorization.

646322073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254695.

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 646322073 is about 25422.8651611104. The cubic root of 646322073 is about 864.6021862359.

The spelling of 646322073 in words is "six hundred forty-six million, three hundred twenty-two thousand, seventy-three".