12117578044 has 96 divisors (see below), whose sum is σ = 26004888000. Its totient is φ = 4866201600.

The previous prime is 12117578029. The next prime is 12117578059. The reversal of 12117578044 is 44087571121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12117578029) and next prime (12117578059).

It is a junction number, because it is equal to n+sod(n) for n = 12117577988 and 12117578006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1238082 + ... + 1247830.

It is an arithmetic number, because the mean of its divisors is an integer number (270884250).

Almost surely, 2^12117578044 is an apocalyptic number.

It is an amenable number.

12117578044 is an abundant number, since it is smaller than the sum of its proper divisors (13887309956).

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

12117578044 is a wasteful number, since it uses less digits than its factorization.

12117578044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871 (or 9869 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The spelling of 12117578044 in words is "twelve billion, one hundred seventeen million, five hundred seventy-eight thousand, forty-four".