2172108979968 has 72 divisors (see below), whose sum is σ = 5795839467600. Its totient is φ = 722174951424.

The previous prime is 2172108979961. The next prime is 2172108980017. The reversal of 2172108979968 is 8699798012712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172108979961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3336553 + ... + 3934056.

Almost surely, 2^{2172108979968} is an apocalyptic number.

It is an amenable number.

2172108979968 is an abundant number, since it is smaller than the sum of its proper divisors (3623730487632).

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

2172108979968 is an equidigital number, since it uses as much as digits as its factorization.

2172108979968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7271017 (or 7271003 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 69.

The spelling of 2172108979968 in words is "two trillion, one hundred seventy-two billion, one hundred eight million, nine hundred seventy-nine thousand, nine hundred sixty-eight".