646329115338 has 16 divisors (see below), whose sum is σ = 1311951637920. Its totient is φ = 212227470576.

The previous prime is 646329115297. The next prime is 646329115339. The reversal of 646329115338 is 833511923646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (646329115339) 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, 803891533 + ... + 803892336.

It is an arithmetic number, because the mean of its divisors is an integer number (81996977370).

Almost surely, 2^646329115338 is an apocalyptic number.

646329115338 is an abundant number, since it is smaller than the sum of its proper divisors (665622522582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646329115338 is a wasteful number, since it uses less digits than its factorization.

646329115338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607783941.

The product of its digits is 2799360, while the sum is 51.

The spelling of 646329115338 in words is "six hundred forty-six billion, three hundred twenty-nine million, one hundred fifteen thousand, three hundred thirty-eight".