123579975321 has 64 divisors (see below), whose sum is σ = 217189589760. Its totient is φ = 68585978880.

The previous prime is 123579975307. The next prime is 123579975341.

It is a happy number.

123579975321 is a `hidden beast` number, since 1 + 2 + 35 + 79 + 9 + 7 + 532 + 1 = 666.

123579975321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123579975321 - 2⁵ = 123579975289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123579975341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143946 + ... + 517571.

It is an arithmetic number, because the mean of its divisors is an integer number (3393587340).

Almost surely, 2^123579975321 is an apocalyptic number.

123579975321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123579975321 is a deficient number, since it is larger than the sum of its proper divisors (93609614439).

123579975321 is a wasteful number, since it uses less digits than its factorization.

123579975321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661591 (or 661585 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 54.

The spelling of 123579975321 in words is "one hundred twenty-three billion, five hundred seventy-nine million, nine hundred seventy-five thousand, three hundred twenty-one".