12126177840 has 80 divisors (see below), whose sum is σ = 42961321728. Its totient is φ = 2771697408.

The previous prime is 12126177823. The next prime is 12126177851. The reversal of 12126177840 is 4877162121.

It is a tau number, because it is divible by the number of its divisors (80).

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, 3607302 + ... + 3610661.

Almost surely, 2^12126177840 is an apocalyptic number.

12126177840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12126177840 is an abundant number, since it is smaller than the sum of its proper divisors (30835143888).

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

12126177840 is a wasteful number, since it uses less digits than its factorization.

12126177840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217986 (or 7217980 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 12126177840 in words is "twelve billion, one hundred twenty-six million, one hundred seventy-seven thousand, eight hundred forty".