321620336641 has 8 divisors (see below), whose sum is σ = 338941858400. Its totient is φ = 304338228480.

The previous prime is 321620336633. The next prime is 321620336657. The reversal of 321620336641 is 146633026123.

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

It is a cyclic number.

It is not a de Polignac number, because 321620336641 - 2³ = 321620336633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321620336641.

It is not an unprimeable number, because it can be changed into a prime (321620336671) 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, 9836640 + ... + 9869281.

It is an arithmetic number, because the mean of its divisors is an integer number (42367732300).

Almost surely, 2^321620336641 is an apocalyptic number.

It is an amenable number.

321620336641 is a deficient number, since it is larger than the sum of its proper divisors (17321521759).

321620336641 is a wasteful number, since it uses less digits than its factorization.

321620336641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19706799.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 321620336641 in words is "three hundred twenty-one billion, six hundred twenty million, three hundred thirty-six thousand, six hundred forty-one".