321009356052 has 216 divisors, whose sum is σ = 1074503731392. Its totient is φ = 79753766400.

The previous prime is 321009356021. The next prime is 321009356077. The reversal of 321009356052 is 250653900123.

321009356052 is a `hidden beast` number, since 3 + 2 + 1 + 0 + 0 + 93 + 560 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 321009355998 and 321009356016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 86652 + ... + 805932.

It is an arithmetic number, because the mean of its divisors is an integer number (4974554312).

Almost surely, 2^321009356052 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 321009356052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537251865696).

321009356052 is an abundant number, since it is smaller than the sum of its proper divisors (753494375340).

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

321009356052 is a wasteful number, since it uses less digits than its factorization.

321009356052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719339 (or 719327 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 321009356052 in words is "three hundred twenty-one billion, nine million, three hundred fifty-six thousand, fifty-two".