321253123545 has 24 divisors (see below), whose sum is σ = 577462406976. Its totient is φ = 171334998576.

The previous prime is 321253123441. The next prime is 321253123547. The reversal of 321253123545 is 545321352123.

321253123545 is a `hidden beast` number, since 32 + 12 + 53 + 1 + 23 + 545 = 666.

It is not a de Polignac number, because 321253123545 - 2³⁶ = 252533646809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321253123547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132201717 + ... + 132204146.

It is an arithmetic number, because the mean of its divisors is an integer number (24060933624).

Almost surely, 2^321253123545 is an apocalyptic number.

It is an amenable number.

321253123545 is a deficient number, since it is larger than the sum of its proper divisors (256209283431).

321253123545 is an equidigital number, since it uses as much as digits as its factorization.

321253123545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264405883 (or 264405871 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 321253123545 its reverse (545321352123), we get a palindrome (866574475668).

The spelling of 321253123545 in words is "three hundred twenty-one billion, two hundred fifty-three million, one hundred twenty-three thousand, five hundred forty-five".