123717531468721 has 8 divisors (see below), whose sum is σ = 124004728401984. Its totient is φ = 123430630770480.

The previous prime is 123717531468679. The next prime is 123717531468731. The reversal of 123717531468721 is 127864135717321.

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 123717531468721 - 2⁴³ = 114921438446513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123717531468731) 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, 73222510 + ... + 74893063.

It is an arithmetic number, because the mean of its divisors is an integer number (15500591050248).

Almost surely, 2^{123717531468721} is an apocalyptic number.

It is an amenable number.

123717531468721 is a deficient number, since it is larger than the sum of its proper divisors (287196933263).

123717531468721 is a wasteful number, since it uses less digits than its factorization.

123717531468721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148117511.

The product of its digits is 11854080, while the sum is 58.

The spelling of 123717531468721 in words is "one hundred twenty-three trillion, seven hundred seventeen billion, five hundred thirty-one million, four hundred sixty-eight thousand, seven hundred twenty-one".