2191608708408 has 512 divisors, whose sum is σ = 7176280320000. Its totient is φ = 606847500288.

The previous prime is 2191608708397. The next prime is 2191608708431. The reversal of 2191608708408 is 8048078061912.

2191608708408 is a `hidden beast` number, since 2 + 1 + 9 + 160 + 8 + 70 + 8 + 408 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2498983266 + ... + 2498984142.

It is an arithmetic number, because the mean of its divisors is an integer number (14016172500).

Almost surely, 2^{2191608708408} is an apocalyptic number.

2191608708408 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 2191608708408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3588140160000).

2191608708408 is an abundant number, since it is smaller than the sum of its proper divisors (4984671611592).

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

2191608708408 is a wasteful number, since it uses less digits than its factorization.

2191608708408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The spelling of 2191608708408 in words is "two trillion, one hundred ninety-one billion, six hundred eight million, seven hundred eight thousand, four hundred eight".