321263645471 has 4 divisors (see below), whose sum is σ = 321281784000. Its totient is φ = 321245506944.

The previous prime is 321263645459. The next prime is 321263645477. The reversal of 321263645471 is 174546362123.

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

It is a cyclic number.

It is not a de Polignac number, because 321263645471 - 2⁶ = 321263645407 is a prime.

It is a super-3 number, since 3×321263645471³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 9042671 + ... + 9078128.

It is an arithmetic number, because the mean of its divisors is an integer number (80320446000).

Almost surely, 2^321263645471 is an apocalyptic number.

321263645471 is a deficient number, since it is larger than the sum of its proper divisors (18138529).

321263645471 is a wasteful number, since it uses less digits than its factorization.

321263645471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18138528.

The product of its digits is 725760, while the sum is 44.

The spelling of 321263645471 in words is "three hundred twenty-one billion, two hundred sixty-three million, six hundred forty-five thousand, four hundred seventy-one".