12178137798 has 12 divisors (see below), whose sum is σ = 26385965268. Its totient is φ = 4059379260.

The previous prime is 12178137781. The next prime is 12178137809. The reversal of 12178137798 is 89773187121.

12178137798 is a `hidden beast` number, since 12 + 178 + 1 + 377 + 98 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338281588 + ... + 338281623.

It is an arithmetic number, because the mean of its divisors is an integer number (2198830439).

Almost surely, 2^12178137798 is an apocalyptic number.

12178137798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12178137798 is an abundant number, since it is smaller than the sum of its proper divisors (14207827470).

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

12178137798 is a wasteful number, since it uses less digits than its factorization.

12178137798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676563219 (or 676563216 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 54.

The spelling of 12178137798 in words is "twelve billion, one hundred seventy-eight million, one hundred thirty-seven thousand, seven hundred ninety-eight".