2191713707988 has 432 divisors, whose sum is σ = 7087529030400. Its totient is φ = 557399107584.

The previous prime is 2191713707891. The next prime is 2191713708001. The reversal of 2191713707988 is 8897073171912.

2191713707988 is a `hidden beast` number, since 2 + 1 + 9 + 171 + 370 + 7 + 98 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

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, 1566628113 + ... + 1566629511.

It is an arithmetic number, because the mean of its divisors is an integer number (16406317200).

Almost surely, 2^{2191713707988} is an apocalyptic number.

2191713707988 is a gapful number since it is divisible by the number (28) 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 2191713707988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3543764515200).

2191713707988 is an abundant number, since it is smaller than the sum of its proper divisors (4895815322412).

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

2191713707988 is a wasteful number, since it uses less digits than its factorization.

2191713707988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2460 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 63.

The spelling of 2191713707988 in words is "two trillion, one hundred ninety-one billion, seven hundred thirteen million, seven hundred seven thousand, nine hundred eighty-eight".