321712199536 has 160 divisors (see below), whose sum is σ = 778568918400. Its totient is φ = 125382131712.

The previous prime is 321712199491. The next prime is 321712199573. The reversal of 321712199536 is 635991217123.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 321712199536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165064290 + ... + 165066238.

It is an arithmetic number, because the mean of its divisors is an integer number (4866055740).

Almost surely, 2^321712199536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321712199536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389284459200).

321712199536 is an abundant number, since it is smaller than the sum of its proper divisors (456856718864).

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

321712199536 is a wasteful number, since it uses less digits than its factorization.

321712199536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603 (or 3597 counting only the distinct ones).

The product of its digits is 612360, while the sum is 49.

The spelling of 321712199536 in words is "three hundred twenty-one billion, seven hundred twelve million, one hundred ninety-nine thousand, five hundred thirty-six".