321682372861 has 4 divisors (see below), whose sum is σ = 321825791232. Its totient is φ = 321538954492.

The previous prime is 321682372841. The next prime is 321682372883. The reversal of 321682372861 is 168273286123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321682372861 - 2³⁵ = 287322634493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321682372811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71705821 + ... + 71710306.

It is an arithmetic number, because the mean of its divisors is an integer number (80456447808).

Almost surely, 2^321682372861 is an apocalyptic number.

It is an amenable number.

321682372861 is a deficient number, since it is larger than the sum of its proper divisors (143418371).

321682372861 is a wasteful number, since it uses less digits than its factorization.

321682372861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143418370.

The product of its digits is 1161216, while the sum is 49.

The spelling of 321682372861 in words is "three hundred twenty-one billion, six hundred eighty-two million, three hundred seventy-two thousand, eight hundred sixty-one".