321673371915025 has 81 divisors (see below), whose sum is σ = 458847608446323. Its totient is φ = 223556496883200.

The previous prime is 321673371915001. The next prime is 321673371915041. The reversal of 321673371915025 is 520519173376123.

The square root of 321673371915025 is 17935255.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 234268523823889 + 87404848091136 = 15305833^2 + 9349056^2 .

It is not a de Polignac number, because 321673371915025 - 2²¹ = 321673369817873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 19818448660 + ... + 19818464890.

Almost surely, 2^{321673371915025} is an apocalyptic number.

321673371915025 is the 17935255-th square number.

321673371915025 is the 8967628-th centered octagonal number.

It is an amenable number.

321673371915025 is a deficient number, since it is larger than the sum of its proper divisors (137174236531298).

321673371915025 is an frugal number, since it uses more digits than its factorization.

321673371915025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32532 (or 16266 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 55.

The spelling of 321673371915025 in words is "three hundred twenty-one trillion, six hundred seventy-three billion, three hundred seventy-one million, nine hundred fifteen thousand, twenty-five".