321015934644 has 12 divisors (see below), whose sum is σ = 749037180864. Its totient is φ = 107005311544.

The previous prime is 321015934637. The next prime is 321015934649. The reversal of 321015934644 is 446439510123.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 321015934596 and 321015934605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321015934649) 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, 13375663932 + ... + 13375663955.

It is an arithmetic number, because the mean of its divisors is an integer number (62419765072).

Almost surely, 2^321015934644 is an apocalyptic number.

It is an amenable number.

321015934644 is an abundant number, since it is smaller than the sum of its proper divisors (428021246220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321015934644 is a wasteful number, since it uses less digits than its factorization.

321015934644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26751327894 (or 26751327892 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 321015934644 in words is "three hundred twenty-one billion, fifteen million, nine hundred thirty-four thousand, six hundred forty-four".