123991584769 has 16 divisors (see below), whose sum is σ = 134423912448. Its totient is φ = 113687525952.

The previous prime is 123991584751. The next prime is 123991584793. The reversal of 123991584769 is 967485199321.

It is not a de Polignac number, because 123991584769 - 2⁹ = 123991584257 is a prime.

It is a super-2 number, since 2×123991584769² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123991584769.

It is not an unprimeable number, because it can be changed into a prime (123991588769) 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, 7680384 + ... + 7696510.

It is an arithmetic number, because the mean of its divisors is an integer number (8401494528).

Almost surely, 2^123991584769 is an apocalyptic number.

It is an amenable number.

123991584769 is a deficient number, since it is larger than the sum of its proper divisors (10432327679).

123991584769 is a wasteful number, since it uses less digits than its factorization.

123991584769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20064.

The product of its digits is 29393280, while the sum is 64.

The spelling of 123991584769 in words is "one hundred twenty-three billion, nine hundred ninety-one million, five hundred eighty-four thousand, seven hundred sixty-nine".