123129692686 has 48 divisors (see below), whose sum is σ = 249860171232. Its totient is φ = 44282399040.

The previous prime is 123129692671. The next prime is 123129692729. The reversal of 123129692686 is 686296921321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2773585 + ... + 2817628.

It is an arithmetic number, because the mean of its divisors is an integer number (5205420234).

Almost surely, 2^123129692686 is an apocalyptic number.

123129692686 is an abundant number, since it is smaller than the sum of its proper divisors (126730478546).

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

123129692686 is a wasteful number, since it uses less digits than its factorization.

123129692686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5591257 (or 5591246 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 123129692686 in words is "one hundred twenty-three billion, one hundred twenty-nine million, six hundred ninety-two thousand, six hundred eighty-six".