321716076981 has 8 divisors (see below), whose sum is σ = 461951290080. Its totient is φ = 197979124272.

The previous prime is 321716076973. The next prime is 321716076991. The reversal of 321716076981 is 189670617123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321716076981 - 2³ = 321716076973 is a prime.

It is a super-2 number, since 2×321716076981² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321716076961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4124565051 + ... + 4124565128.

It is an arithmetic number, because the mean of its divisors is an integer number (57743911260).

Almost surely, 2^321716076981 is an apocalyptic number.

It is an amenable number.

321716076981 is a deficient number, since it is larger than the sum of its proper divisors (140235213099).

321716076981 is a wasteful number, since it uses less digits than its factorization.

321716076981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8249130195.

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 321716076981 in words is "three hundred twenty-one billion, seven hundred sixteen million, seventy-six thousand, nine hundred eighty-one".