113365717920 has 864 divisors, whose sum is σ = 491567508432. Its totient is φ = 23577329664.

The previous prime is 113365717919. The next prime is 113365717943. The reversal of 113365717920 is 29717563311.

113365717920 is a `hidden beast` number, since 1 + 1 + 3 + 3 + 6 + 571 + 79 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 25391785104 + 87973932816 = 159348^2 + 296604^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 66960594 + ... + 66962286.

Almost surely, 2^113365717920 is an apocalyptic number.

113365717920 is a gapful number since it is divisible by the number (10) 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 113365717920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245783754216).

113365717920 is an abundant number, since it is smaller than the sum of its proper divisors (378201790512).

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

113365717920 is a wasteful number, since it uses less digits than its factorization.

113365717920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814 (or 1796 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 113365717920 in words is "one hundred thirteen billion, three hundred sixty-five million, seven hundred seventeen thousand, nine hundred twenty".