123717765489 has 16 divisors (see below), whose sum is σ = 174943499328. Its totient is φ = 77501000192.

The previous prime is 123717765373. The next prime is 123717765497. The reversal of 123717765489 is 984567717321.

It is a cyclic number.

It is not a de Polignac number, because 123717765489 - 2¹¹ = 123717763441 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (123717760489) 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 15 ways as a sum of consecutive naturals, for example, 1934367 + ... + 1997300.

It is an arithmetic number, because the mean of its divisors is an integer number (10933968708).

Almost surely, 2^123717765489 is an apocalyptic number.

It is an amenable number.

123717765489 is a deficient number, since it is larger than the sum of its proper divisors (51225733839).

123717765489 is a wasteful number, since it uses less digits than its factorization.

123717765489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932304.

The product of its digits is 17781120, while the sum is 60.

The spelling of 123717765489 in words is "one hundred twenty-three billion, seven hundred seventeen million, seven hundred sixty-five thousand, four hundred eighty-nine".