123404985612 has 18 divisors (see below), whose sum is σ = 311940380388. Its totient is φ = 41134995192.

The previous prime is 123404985601. The next prime is 123404985623. The reversal of 123404985612 is 216589404321.

123404985612 is a `hidden beast` number, since 1 + 2 + 3 + 40 + 49 + 8 + 561 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (123404985601) and next prime (123404985623).

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 1713958098 + ... + 1713958169.

Almost surely, 2^123404985612 is an apocalyptic number.

123404985612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123404985612 is an abundant number, since it is smaller than the sum of its proper divisors (188535394776).

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

123404985612 is a wasteful number, since it uses less digits than its factorization.

123404985612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427916277 (or 3427916272 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 123404985612 in words is "one hundred twenty-three billion, four hundred four million, nine hundred eighty-five thousand, six hundred twelve".