123548391321 has 8 divisors (see below), whose sum is σ = 165988678944. Its totient is φ = 81736848960.

The previous prime is 123548391313. The next prime is 123548391331. The reversal of 123548391321 is 123193845321.

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

It is not a de Polignac number, because 123548391321 - 2³ = 123548391313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123548391311) 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 7 ways as a sum of consecutive naturals, for example, 157185856 + ... + 157186641.

It is an arithmetic number, because the mean of its divisors is an integer number (20748584868).

Almost surely, 2^123548391321 is an apocalyptic number.

It is an amenable number.

123548391321 is a deficient number, since it is larger than the sum of its proper divisors (42440287623).

123548391321 is a wasteful number, since it uses less digits than its factorization.

123548391321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314372631.

The product of its digits is 155520, while the sum is 42.

The spelling of 123548391321 in words is "one hundred twenty-three billion, five hundred forty-eight million, three hundred ninety-one thousand, three hundred twenty-one".