123544907680 has 96 divisors (see below), whose sum is σ = 296435296080. Its totient is φ = 48651632640.

The previous prime is 123544907657. The next prime is 123544907719. The reversal of 123544907680 is 86709445321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 19904695056 + 103640212624 = 141084^2 + 321932^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2715520 + ... + 2760640.

It is a 2-persistent number, because it is pandigital, and so is 2⋅123544907680 = 247089815360, but 3⋅123544907680 = 370634723040 is not.

Almost surely, 2^123544907680 is an apocalyptic number.

123544907680 is a gapful number since it is divisible by the number (10) 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 123544907680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148217648040).

123544907680 is an abundant number, since it is smaller than the sum of its proper divisors (172890388400).

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

123544907680 is a wasteful number, since it uses less digits than its factorization.

123544907680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45402 (or 45394 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 123544907680 in words is "one hundred twenty-three billion, five hundred forty-four million, nine hundred seven thousand, six hundred eighty".