49221018735991 has 4 divisors (see below), whose sum is σ = 49221033433000. Its totient is φ = 49221004038984.

The previous prime is 49221018735983. The next prime is 49221018736007. The reversal of 49221018735991 is 19953781012294.

49221018735991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 49221018735991 - 2³ = 49221018735983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49221018715991) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 394945 + ... + 9929653.

It is an arithmetic number, because the mean of its divisors is an integer number (12305258358250).

Almost surely, 2^{49221018735991} is an apocalyptic number.

49221018735991 is a deficient number, since it is larger than the sum of its proper divisors (14697009).

49221018735991 is an equidigital number, since it uses as much as digits as its factorization.

49221018735991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14697008.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 49221018735991 in words is "forty-nine trillion, two hundred twenty-one billion, eighteen million, seven hundred thirty-five thousand, nine hundred ninety-one".