321546043776664 has 64 divisors (see below), whose sum is σ = 691281264960000. Its totient is φ = 137355263958528.

The previous prime is 321546043776647. The next prime is 321546043776673. The reversal of 321546043776664 is 466677340645123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321546043776596 and 321546043776605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18323847 + ... + 31286665.

It is an arithmetic number, because the mean of its divisors is an integer number (10801269765000).

Almost surely, 2^{321546043776664} is an apocalyptic number.

It is an amenable number.

321546043776664 is an abundant number, since it is smaller than the sum of its proper divisors (369735221183336).

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

321546043776664 is a wasteful number, since it uses less digits than its factorization.

321546043776664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964280 (or 12964276 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 64.

The spelling of 321546043776664 in words is "three hundred twenty-one trillion, five hundred forty-six billion, forty-three million, seven hundred seventy-six thousand, six hundred sixty-four".