2179665403968 has 112 divisors (see below), whose sum is σ = 6211515542400. Its totient is φ = 670572724224.

The previous prime is 2179665403963. The next prime is 2179665403987. The reversal of 2179665403968 is 8693045669712.

It is a junction number, because it is equal to n+sod(n) for n = 2179665403899 and 2179665403908.

It is not an unprimeable number, because it can be changed into a prime (2179665403963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19034821 + ... + 19148987.

It is an arithmetic number, because the mean of its divisors is an integer number (55459960200).

It is a 1-persistent number, because it is pandigital, but 2⋅2179665403968 = 4359330807936 is not.

Almost surely, 2^{2179665403968} is an apocalyptic number.

It is an amenable number.

2179665403968 is an abundant number, since it is smaller than the sum of its proper divisors (4031850138432).

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

2179665403968 is a wasteful number, since it uses less digits than its factorization.

2179665403968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121844 (or 121834 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 66.

The spelling of 2179665403968 in words is "two trillion, one hundred seventy-nine billion, six hundred sixty-five million, four hundred three thousand, nine hundred sixty-eight".