2122398191844 has 72 divisors (see below), whose sum is σ = 6131747102208. Its totient is φ = 606362440320.

The previous prime is 2122398191827. The next prime is 2122398191857. The reversal of 2122398191844 is 4481918932212.

2122398191844 is a `hidden beast` number, since 2 + 1 + 22 + 398 + 191 + 8 + 44 = 666.

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 23 ways as a sum of consecutive naturals, for example, 4016824 + ... + 4514384.

Almost surely, 2^{2122398191844} is an apocalyptic number.

It is an amenable number.

2122398191844 is an abundant number, since it is smaller than the sum of its proper divisors (4009348910364).

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

2122398191844 is a wasteful number, since it uses less digits than its factorization.

2122398191844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514505 (or 514500 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 2122398191844 in words is "two trillion, one hundred twenty-two billion, three hundred ninety-eight million, one hundred ninety-one thousand, eight hundred forty-four".