1794321919721 has 16 divisors (see below), whose sum is σ = 1821810735360. Its totient is φ = 1767093719040.

The previous prime is 1794321919681. The next prime is 1794321919739. The reversal of 1794321919721 is 1279191234971.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1794321919721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1794321919121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8957360 + ... + 9155486.

It is an arithmetic number, because the mean of its divisors is an integer number (113863170960).

Almost surely, 2^{1794321919721} is an apocalyptic number.

It is an amenable number.

1794321919721 is a deficient number, since it is larger than the sum of its proper divisors (27488815639).

1794321919721 is a wasteful number, since it uses less digits than its factorization.

1794321919721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198784.

The product of its digits is 1714608, while the sum is 56.

The spelling of 1794321919721 in words is "one trillion, seven hundred ninety-four billion, three hundred twenty-one million, nine hundred nineteen thousand, seven hundred twenty-one".