44521168421 has 2 divisors, whose sum is σ = 44521168422. Its totient is φ = 44521168420.

The previous prime is 44521168409. The next prime is 44521168453. The reversal of 44521168421 is 12486112544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44515092196 + 6076225 = 210986^2 + 2465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44521168421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44521168121) by changing a digit.

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 as a sum of consecutive naturals, namely, 22260584210 + 22260584211.

It is an arithmetic number, because the mean of its divisors is an integer number (22260584211).

Almost surely, 2^44521168421 is an apocalyptic number.

It is an amenable number.

44521168421 is a deficient number, since it is larger than the sum of its proper divisors (1).

44521168421 is an equidigital number, since it uses as much as digits as its factorization.

44521168421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 38.

The spelling of 44521168421 in words is "forty-four billion, five hundred twenty-one million, one hundred sixty-eight thousand, four hundred twenty-one".