664232506453 has 8 divisors (see below), whose sum is σ = 678504972600. Its totient is φ = 650024476608.

The previous prime is 664232506451. The next prime is 664232506471. The reversal of 664232506453 is 354605232466.

It can be written as a sum of positive squares in 4 ways, for example, as 58142230129 + 606090276324 = 241127^2 + 778518^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 664232506453 - 2¹ = 664232506451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664232506451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16088238 + ... + 16129471.

It is an arithmetic number, because the mean of its divisors is an integer number (84813121575).

Almost surely, 2^664232506453 is an apocalyptic number.

It is an amenable number.

664232506453 is a deficient number, since it is larger than the sum of its proper divisors (14272466147).

664232506453 is a wasteful number, since it uses less digits than its factorization.

664232506453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32218151.

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 664232506453 in words is "six hundred sixty-four billion, two hundred thirty-two million, five hundred six thousand, four hundred fifty-three".