1678459960321 has 4 divisors (see below), whose sum is σ = 1678479755200. Its totient is φ = 1678440165444.

The previous prime is 1678459960291. The next prime is 1678459960327. The reversal of 1678459960321 is 1230699548761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1678459960321 - 2¹³ = 1678459952129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1678459960321.

It is not an unprimeable number, because it can be changed into a prime (1678459960327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9769701 + ... + 9940018.

It is an arithmetic number, because the mean of its divisors is an integer number (419619938800).

It is a 1-persistent number, because it is pandigital, but 2⋅1678459960321 = 3356919920642 is not.

Almost surely, 2^{1678459960321} is an apocalyptic number.

It is an amenable number.

1678459960321 is a deficient number, since it is larger than the sum of its proper divisors (19794879).

1678459960321 is an equidigital number, since it uses as much as digits as its factorization.

1678459960321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19794878.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 1678459960321 in words is "one trillion, six hundred seventy-eight billion, four hundred fifty-nine million, nine hundred sixty thousand, three hundred twenty-one".