123991828780 has 96 divisors (see below), whose sum is σ = 268719897600. Its totient is φ = 48036338688.

The previous prime is 123991828739. The next prime is 123991828781. The reversal of 123991828780 is 87828199321.

It is not an unprimeable number, because it can be changed into a prime (123991828781) 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, 55278339 + ... + 55280581.

It is an arithmetic number, because the mean of its divisors is an integer number (2799165600).

Almost surely, 2^123991828780 is an apocalyptic number.

123991828780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123991828780 is an abundant number, since it is smaller than the sum of its proper divisors (144728068820).

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

123991828780 is a wasteful number, since it uses less digits than its factorization.

123991828780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 58.

The spelling of 123991828780 in words is "one hundred twenty-three billion, nine hundred ninety-one million, eight hundred twenty-eight thousand, seven hundred eighty".