111869479661856 has 864 divisors, whose sum is σ = 387998234773632. Its totient is φ = 28031614894080.

The previous prime is 111869479661843. The next prime is 111869479661879. The reversal of 111869479661856 is 658166974968111.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1760943565 + ... + 1761007091.

It is an arithmetic number, because the mean of its divisors is an integer number (449072030988).

Almost surely, 2^{111869479661856} is an apocalyptic number.

111869479661856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111869479661856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193999117386816).

111869479661856 is an abundant number, since it is smaller than the sum of its proper divisors (276128755111776).

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

111869479661856 is a wasteful number, since it uses less digits than its factorization.

111869479661856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63670 (or 63636 counting only the distinct ones).

The product of its digits is 940584960, while the sum is 78.

The spelling of 111869479661856 in words is "one hundred eleven trillion, eight hundred sixty-nine billion, four hundred seventy-nine million, six hundred sixty-one thousand, eight hundred fifty-six".