321553934465 has 8 divisors (see below), whose sum is σ = 386494194408. Its totient is φ = 256823498880.

The previous prime is 321553934459. The next prime is 321553934473. The reversal of 321553934465 is 564439355123.

It can be written as a sum of positive squares in 4 ways, for example, as 18119313664 + 303434620801 = 134608^2 + 550849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321553934465 - 2⁸ = 321553934209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52452716 + ... + 52458845.

It is an arithmetic number, because the mean of its divisors is an integer number (48311774301).

Almost surely, 2^321553934465 is an apocalyptic number.

It is an amenable number.

321553934465 is a deficient number, since it is larger than the sum of its proper divisors (64940259943).

321553934465 is a wasteful number, since it uses less digits than its factorization.

321553934465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104912179.

The product of its digits is 5832000, while the sum is 50.

The spelling of 321553934465 in words is "three hundred twenty-one billion, five hundred fifty-three million, nine hundred thirty-four thousand, four hundred sixty-five".