321263645473 has 16 divisors (see below), whose sum is σ = 337228186176. Its totient is φ = 305756942400.

The previous prime is 321263645459. The next prime is 321263645477. The reversal of 321263645473 is 374546362123.

It is a cyclic number.

It is not a de Polignac number, because 321263645473 - 2⁵ = 321263645441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321263645477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207711 + ... + 828052.

It is an arithmetic number, because the mean of its divisors is an integer number (21076761636).

Almost surely, 2^321263645473 is an apocalyptic number.

It is an amenable number.

321263645473 is a deficient number, since it is larger than the sum of its proper divisors (15964540703).

321263645473 is a wasteful number, since it uses less digits than its factorization.

321263645473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035984.

The product of its digits is 2177280, while the sum is 46.

The spelling of 321263645473 in words is "three hundred twenty-one billion, two hundred sixty-three million, six hundred forty-five thousand, four hundred seventy-three".