329387451681 has 8 divisors (see below), whose sum is σ = 454327519680. Its totient is φ = 212019509072.

The previous prime is 329387451661. The next prime is 329387451703. The reversal of 329387451681 is 186154783923.

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

It is a cyclic number.

It is not a de Polignac number, because 329387451681 - 2⁵ = 329387451649 is a prime.

It is a super-2 number, since 2×329387451681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (329387451641) 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, 1893031245 + ... + 1893031418.

It is an arithmetic number, because the mean of its divisors is an integer number (56790939960).

Almost surely, 2^329387451681 is an apocalyptic number.

It is an amenable number.

329387451681 is a deficient number, since it is larger than the sum of its proper divisors (124940067999).

329387451681 is a wasteful number, since it uses less digits than its factorization.

329387451681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786062695.

The product of its digits is 8709120, while the sum is 57.

The spelling of 329387451681 in words is "three hundred twenty-nine billion, three hundred eighty-seven million, four hundred fifty-one thousand, six hundred eighty-one".