44440006421 has 2 divisors, whose sum is σ = 44440006422. Its totient is φ = 44440006420.

The previous prime is 44440006417. The next prime is 44440006451. The reversal of 44440006421 is 12460004444.

44440006421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39467782225 + 4972224196 = 198665^2 + 70514^2 .

It is a cyclic number.

It is not a de Polignac number, because 44440006421 - 2² = 44440006417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44440006451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22220003210 + 22220003211.

It is an arithmetic number, because the mean of its divisors is an integer number (22220003211).

Almost surely, 2^44440006421 is an apocalyptic number.

It is an amenable number.

44440006421 is a deficient number, since it is larger than the sum of its proper divisors (1).

44440006421 is an equidigital number, since it uses as much as digits as its factorization.

44440006421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

The spelling of 44440006421 in words is "forty-four billion, four hundred forty million, six thousand, four hundred twenty-one".