123954398568 has 192 divisors, whose sum is σ = 450743529600. Its totient is φ = 29719319040.

The previous prime is 123954398549. The next prime is 123954398599. The reversal of 123954398568 is 865893459321.

123954398568 is a `hidden beast` number, since 1 + 2 + 3 + 9 + 543 + 9 + 85 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 787863 + ... + 932006.

It is an arithmetic number, because the mean of its divisors is an integer number (2347622550).

Almost surely, 2^123954398568 is an apocalyptic number.

123954398568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

123954398568 is an abundant number, since it is smaller than the sum of its proper divisors (326789131032).

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

123954398568 is a wasteful number, since it uses less digits than its factorization.

123954398568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719912 (or 1719905 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 63.

The spelling of 123954398568 in words is "one hundred twenty-three billion, nine hundred fifty-four million, three hundred ninety-eight thousand, five hundred sixty-eight".