123631361789 has 16 divisors (see below), whose sum is σ = 134563524480. Its totient is φ = 112904097600.

The previous prime is 123631361729. The next prime is 123631361863. The reversal of 123631361789 is 987163136321.

It is a cyclic number.

It is not a de Polignac number, because 123631361789 - 2²⁸ = 123362926333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123631361729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696154 + ... + 1767540.

It is an arithmetic number, because the mean of its divisors is an integer number (8410220280).

Almost surely, 2^123631361789 is an apocalyptic number.

It is an amenable number.

123631361789 is a deficient number, since it is larger than the sum of its proper divisors (10932162691).

123631361789 is a wasteful number, since it uses less digits than its factorization.

123631361789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72820.

The product of its digits is 979776, while the sum is 50.

The spelling of 123631361789 in words is "one hundred twenty-three billion, six hundred thirty-one million, three hundred sixty-one thousand, seven hundred eighty-nine".