11921773794958 has 64 divisors (see below), whose sum is σ = 19524751272000. Its totient is φ = 5437940465664.

The previous prime is 11921773794907. The next prime is 11921773795031. The reversal of 11921773794958 is 85949737712911.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 748048366 + ... + 748064302.

It is an arithmetic number, because the mean of its divisors is an integer number (305074238625).

Almost surely, 2^{11921773794958} is an apocalyptic number.

11921773794958 is a deficient number, since it is larger than the sum of its proper divisors (7602977477042).

11921773794958 is a wasteful number, since it uses less digits than its factorization.

11921773794958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17749.

The product of its digits is 240045120, while the sum is 73.

The spelling of 11921773794958 in words is "eleven trillion, nine hundred twenty-one billion, seven hundred seventy-three million, seven hundred ninety-four thousand, nine hundred fifty-eight".