2171850976896 has 64 divisors (see below), whose sum is σ = 5788668805920. Its totient is φ = 721479468032.

The previous prime is 2171850976877. The next prime is 2171850976949. The reversal of 2171850976896 is 6986790581712.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 2171850976896.

It is an unprimeable number.

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, 9539130 + ... + 9764153.

Almost surely, 2^{2171850976896} is an apocalyptic number.

It is an amenable number.

2171850976896 is an abundant number, since it is smaller than the sum of its proper divisors (3616817829024).

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

2171850976896 is a wasteful number, since it uses less digits than its factorization.

2171850976896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19303593 (or 19303581 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 69.

The spelling of 2171850976896 in words is "two trillion, one hundred seventy-one billion, eight hundred fifty million, nine hundred seventy-six thousand, eight hundred ninety-six".