321960987663 has 8 divisors (see below), whose sum is σ = 490607219328. Its totient is φ = 183977707224.

The previous prime is 321960987637. The next prime is 321960987671. The reversal of 321960987663 is 366789069123.

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

It is not a de Polignac number, because 321960987663 - 2⁹ = 321960987151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321960987597 and 321960987606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321960987683) 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, 7665737781 + ... + 7665737822.

It is an arithmetic number, because the mean of its divisors is an integer number (61325902416).

Almost surely, 2^321960987663 is an apocalyptic number.

321960987663 is a deficient number, since it is larger than the sum of its proper divisors (168646231665).

321960987663 is a wasteful number, since it uses less digits than its factorization.

321960987663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15331475613.

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 321960987663 in words is "three hundred twenty-one billion, nine hundred sixty million, nine hundred eighty-seven thousand, six hundred sixty-three".