1693366456321 has 4 divisors (see below), whose sum is σ = 1694662070832. Its totient is φ = 1692070841812.

The previous prime is 1693366456277. The next prime is 1693366456381. The reversal of 1693366456321 is 1236546633961.

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 a de Polignac number, because none of the positive numbers 2^k-1693366456321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1693366456381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647805295 + ... + 647807908.

It is an arithmetic number, because the mean of its divisors is an integer number (423665517708).

Almost surely, 2^{1693366456321} is an apocalyptic number.

It is an amenable number.

1693366456321 is a deficient number, since it is larger than the sum of its proper divisors (1295614511).

1693366456321 is a wasteful number, since it uses less digits than its factorization.

1693366456321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295614510.

The product of its digits is 12597120, while the sum is 55.

The spelling of 1693366456321 in words is "one trillion, six hundred ninety-three billion, three hundred sixty-six million, four hundred fifty-six thousand, three hundred twenty-one".