123989741568 has 936 divisors, whose sum is σ = 475156109376. Its totient is φ = 30510120960.

The previous prime is 123989741527. The next prime is 123989741569. The reversal of 123989741568 is 865147989321.

123989741568 is a `hidden beast` number, since 1 + 2 + 398 + 97 + 4 + 156 + 8 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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

Its product of digits (26127360) is a multiple of the sum of its prime divisors (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123989741569) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6525775863 + ... + 6525775881.

It is an arithmetic number, because the mean of its divisors is an integer number (507645416).

Almost surely, 2^123989741568 is an apocalyptic number.

123989741568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123989741568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237578054688).

123989741568 is an abundant number, since it is smaller than the sum of its proper divisors (351166367808).

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

123989741568 is an equidigital number, since it uses as much as digits as its factorization.

123989741568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 42 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 123989741568 in words is "one hundred twenty-three billion, nine hundred eighty-nine million, seven hundred forty-one thousand, five hundred sixty-eight".