1672309504321 has 4 divisors (see below), whose sum is σ = 1770680651652. Its totient is φ = 1573938356992.

The previous prime is 1672309504277. The next prime is 1672309504363. The reversal of 1672309504321 is 1234059032761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 451229253696 + 1221080250625 = 671736^2 + 1105025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672309504321 - 2¹¹ = 1672309502273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672309502321) 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, 49185573640 + ... + 49185573673.

It is an arithmetic number, because the mean of its divisors is an integer number (442670162913).

Almost surely, 2^{1672309504321} is an apocalyptic number.

It is an amenable number.

1672309504321 is a deficient number, since it is larger than the sum of its proper divisors (98371147331).

1672309504321 is an equidigital number, since it uses as much as digits as its factorization.

1672309504321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98371147330.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 1672309504321 in words is "one trillion, six hundred seventy-two billion, three hundred nine million, five hundred four thousand, three hundred twenty-one".