8978117505612 has 48 divisors (see below), whose sum is σ = 21515630099040. Its totient is φ = 2911753999872.

The previous prime is 8978117505611. The next prime is 8978117505671. The reversal of 8978117505612 is 2165057118798.

It is not an unprimeable number, because it can be changed into a prime (8978117505611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20974464 + ... + 21398232.

It is an arithmetic number, because the mean of its divisors is an integer number (448242293730).

Almost surely, 2^{8978117505612} is an apocalyptic number.

It is an amenable number.

8978117505612 is an abundant number, since it is smaller than the sum of its proper divisors (12537512593428).

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

8978117505612 is a wasteful number, since it uses less digits than its factorization.

8978117505612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471530 (or 471528 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 60.

The spelling of 8978117505612 in words is "eight trillion, nine hundred seventy-eight billion, one hundred seventeen million, five hundred five thousand, six hundred twelve".