123289766512 has 20 divisors (see below), whose sum is σ = 260589734136. Its totient is φ = 56040802880.

The previous prime is 123289766507. The next prime is 123289766527. The reversal of 123289766512 is 215667982321.

It is a super-2 number, since 2×123289766512² (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 123289766512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350254843 + ... + 350255194.

Almost surely, 2^123289766512 is an apocalyptic number.

It is an amenable number.

123289766512 is an abundant number, since it is smaller than the sum of its proper divisors (137299967624).

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

123289766512 is a wasteful number, since it uses less digits than its factorization.

123289766512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700510056 (or 700510050 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 123289766512 in words is "one hundred twenty-three billion, two hundred eighty-nine million, seven hundred sixty-six thousand, five hundred twelve".