113640865780 has 96 divisors (see below), whose sum is σ = 265906206720. Its totient is φ = 40512407040.

The previous prime is 113640865777. The next prime is 113640865783. The reversal of 113640865780 is 87568046311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (113640865777) and next prime (113640865783).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113640865783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3522282 + ... + 3554398.

It is an arithmetic number, because the mean of its divisors is an integer number (2769856320).

Almost surely, 2^113640865780 is an apocalyptic number.

113640865780 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 113640865780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132953103360).

113640865780 is an abundant number, since it is smaller than the sum of its proper divisors (152265340940).

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

113640865780 is a wasteful number, since it uses less digits than its factorization.

113640865780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32609 (or 32607 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 113640865780 in words is "one hundred thirteen billion, six hundred forty million, eight hundred sixty-five thousand, seven hundred eighty".