123477855798 has 32 divisors (see below), whose sum is σ = 281119548672. Its totient is φ = 35790682400.

The previous prime is 123477855773. The next prime is 123477855817. The reversal of 123477855798 is 897558774321.

123477855798 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40669713 + ... + 40672748.

It is an arithmetic number, because the mean of its divisors is an integer number (8784985896).

Almost surely, 2^123477855798 is an apocalyptic number.

123477855798 is an abundant number, since it is smaller than the sum of its proper divisors (157641692874).

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

123477855798 is a wasteful number, since it uses less digits than its factorization.

123477855798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81342500.

The product of its digits is 118540800, while the sum is 66.

The spelling of 123477855798 in words is "one hundred twenty-three billion, four hundred seventy-seven million, eight hundred fifty-five thousand, seven hundred ninety-eight".