326820072864 has 24 divisors (see below), whose sum is σ = 857902691520. Its totient is φ = 108940024256.

The previous prime is 326820072853. The next prime is 326820072961. The reversal of 326820072864 is 468270028623.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×326820072864² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702187784 + ... + 1702187975.

It is an arithmetic number, because the mean of its divisors is an integer number (35745945480).

Almost surely, 2^326820072864 is an apocalyptic number.

It is an amenable number.

326820072864 is an abundant number, since it is smaller than the sum of its proper divisors (531082618656).

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

326820072864 is a wasteful number, since it uses less digits than its factorization.

326820072864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404375772 (or 3404375764 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 48.

The spelling of 326820072864 in words is "three hundred twenty-six billion, eight hundred twenty million, seventy-two thousand, eight hundred sixty-four".