2291921066875 has 20 divisors (see below), whose sum is σ = 3124346807736. Its totient is φ = 1666851680000.

The previous prime is 2291921066819. The next prime is 2291921066899. The reversal of 2291921066875 is 5786601291922.

It is a happy number.

It is not a de Polignac number, because 2291921066875 - 2²¹ = 2291918969723 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 166678294 + ... + 166692043.

Almost surely, 2^{2291921066875} is an apocalyptic number.

2291921066875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2291921066875 is a deficient number, since it is larger than the sum of its proper divisors (832425740861).

2291921066875 is an equidigital number, since it uses as much as digits as its factorization.

2291921066875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333370368 (or 333370353 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 2291921066875 in words is "two trillion, two hundred ninety-one billion, nine hundred twenty-one million, sixty-six thousand, eight hundred seventy-five".