1117861808340 has 192 divisors, whose sum is σ = 3186701844480. Its totient is φ = 292757821440.

The previous prime is 1117861808257. The next prime is 1117861808347. The reversal of 1117861808340 is 438081687111.

It is a self number, because there is not a number n which added to its sum of digits gives 1117861808340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117861808347) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 369784069 + ... + 369787091.

It is an arithmetic number, because the mean of its divisors is an integer number (16597405440).

Almost surely, 2^{1117861808340} is an apocalyptic number.

1117861808340 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 1117861808340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593350922240).

1117861808340 is an abundant number, since it is smaller than the sum of its proper divisors (2068840036140).

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

1117861808340 is a wasteful number, since it uses less digits than its factorization.

1117861808340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 1117861808340 in words is "one trillion, one hundred seventeen billion, eight hundred sixty-one million, eight hundred eight thousand, three hundred forty".