123865839630 has 64 divisors (see below), whose sum is σ = 355717293120. Its totient is φ = 30490051968.

The previous prime is 123865839613. The next prime is 123865839631. The reversal of 123865839630 is 36938568321.

It is a happy number.

123865839630 is a `hidden beast` number, since 1 + 23 + 8 + 6 + 583 + 9 + 6 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123865839631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17641197 + ... + 17648216.

It is an arithmetic number, because the mean of its divisors is an integer number (5558082705).

Almost surely, 2^123865839630 is an apocalyptic number.

123865839630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123865839630 is an abundant number, since it is smaller than the sum of its proper divisors (231851453490).

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

123865839630 is a wasteful number, since it uses less digits than its factorization.

123865839630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35289442 (or 35289436 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 123865839630 in words is "one hundred twenty-three billion, eight hundred sixty-five million, eight hundred thirty-nine thousand, six hundred thirty".