123839531712 has 168 divisors, whose sum is σ = 404755356096. Its totient is φ = 35862994944.

The previous prime is 123839531701. The next prime is 123839531713. The reversal of 123839531712 is 217135938321.

123839531712 is a `hidden beast` number, since 1 + 23 + 83 + 9 + 531 + 7 + 12 = 666.

It is a super-2 number, since 2×123839531712² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123839531713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359128 + ... + 613719.

It is an arithmetic number, because the mean of its divisors is an integer number (2409258072).

Almost surely, 2^123839531712 is an apocalyptic number.

123839531712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123839531712 is an abundant number, since it is smaller than the sum of its proper divisors (280915824384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123839531712 is a wasteful number, since it uses less digits than its factorization.

123839531712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972895 (or 972882 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 123839531712 in words is "one hundred twenty-three billion, eight hundred thirty-nine million, five hundred thirty-one thousand, seven hundred twelve".