321025422564 has 432 divisors, whose sum is σ = 1103654837376. Its totient is φ = 77598259200.

The previous prime is 321025422547. The next prime is 321025422593. The reversal of 321025422564 is 465224520123.

321025422564 is a `hidden beast` number, since 3 + 2 + 102 + 542 + 2 + 5 + 6 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 16503084 + ... + 16522524.

It is an arithmetic number, because the mean of its divisors is an integer number (2554756568).

Almost surely, 2^321025422564 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 321025422564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551827418688).

321025422564 is an abundant number, since it is smaller than the sum of its proper divisors (782629414812).

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

321025422564 is a wasteful number, since it uses less digits than its factorization.

321025422564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19536 (or 19524 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 321025422564 its reverse (465224520123), we get a palindrome (786249942687).

The spelling of 321025422564 in words is "three hundred twenty-one billion, twenty-five million, four hundred twenty-two thousand, five hundred sixty-four".