1721313606873 has 64 divisors (see below), whose sum is σ = 2734932721664. Its totient is φ = 942264576000.

The previous prime is 1721313606853. The next prime is 1721313606907. The reversal of 1721313606873 is 3786063131271.

It is not a de Polignac number, because 1721313606873 - 2⁵ = 1721313606841 is a prime.

It is a super-2 number, since 2×1721313606873² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1721313606833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 325941993 + ... + 325947273.

It is an arithmetic number, because the mean of its divisors is an integer number (42733323776).

Almost surely, 2^{1721313606873} is an apocalyptic number.

It is an amenable number.

1721313606873 is a deficient number, since it is larger than the sum of its proper divisors (1013619114791).

1721313606873 is a wasteful number, since it uses less digits than its factorization.

1721313606873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286.

The product of its (nonzero) digits is 762048, while the sum is 48.

The spelling of 1721313606873 in words is "one trillion, seven hundred twenty-one billion, three hundred thirteen million, six hundred six thousand, eight hundred seventy-three".