321378764467 has 4 divisors (see below), whose sum is σ = 321380695440. Its totient is φ = 321376833496.

The previous prime is 321378764449. The next prime is 321378764471. The reversal of 321378764467 is 764467873123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321378764467 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321378764767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689548 + ... + 1057465.

It is an arithmetic number, because the mean of its divisors is an integer number (80345173860).

Almost surely, 2^321378764467 is an apocalyptic number.

321378764467 is a deficient number, since it is larger than the sum of its proper divisors (1930973).

321378764467 is a wasteful number, since it uses less digits than its factorization.

321378764467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930972.

The product of its digits is 28449792, while the sum is 58.

The spelling of 321378764467 in words is "three hundred twenty-one billion, three hundred seventy-eight million, seven hundred sixty-four thousand, four hundred sixty-seven".