321427766916 has 63 divisors (see below), whose sum is σ = 843442422151. Its totient is φ = 107132383944.

The previous prime is 321427766897. The next prime is 321427766981. The reversal of 321427766916 is 619667724123.

The square root of 321427766916 is 566946.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 30609835 + ... + 30620333.

Almost surely, 2^321427766916 is an apocalyptic number.

321427766916 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

321427766916 is the 566946-th square number.

It is an amenable number.

321427766916 is an abundant number, since it is smaller than the sum of its proper divisors (522014655235).

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

321427766916 is an frugal number, since it uses more digits than its factorization.

321427766916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020 (or 10504 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 321427766916 in words is "three hundred twenty-one billion, four hundred twenty-seven million, seven hundred sixty-six thousand, nine hundred sixteen".