12123485840 has 40 divisors (see below), whose sum is σ = 29412635328. Its totient is φ = 4638550400.

The previous prime is 12123485831. The next prime is 12123485861. The reversal of 12123485840 is 4858432121.

12123485840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 12123485794 and 12123485803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292586 + ... + 3296265.

Almost surely, 2^12123485840 is an apocalyptic number.

12123485840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123485840 is an abundant number, since it is smaller than the sum of its proper divisors (17289149488).

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

12123485840 is a wasteful number, since it uses less digits than its factorization.

12123485840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6588887 (or 6588881 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 12123485840 in words is "twelve billion, one hundred twenty-three million, four hundred eighty-five thousand, eight hundred forty".