12118699501656 has 384 divisors, whose sum is σ = 37172358881280. Its totient is φ = 3273633792000.

The previous prime is 12118699501637. The next prime is 12118699501669. The reversal of 12118699501656 is 65610599681121.

It is a happy number.

It is a super-2 number, since 2×12118699501656² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12118699501656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 71844936 + ... + 72013416.

It is an arithmetic number, because the mean of its divisors is an integer number (96803017920).

Almost surely, 2^{12118699501656} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12118699501656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18586179440640).

12118699501656 is an abundant number, since it is smaller than the sum of its proper divisors (25053659379624).

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

12118699501656 is a wasteful number, since it uses less digits than its factorization.

12118699501656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168607 (or 168592 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 60.

The spelling of 12118699501656 in words is "twelve trillion, one hundred eighteen billion, six hundred ninety-nine million, five hundred one thousand, six hundred fifty-six".