44395604921 has 2 divisors, whose sum is σ = 44395604922. Its totient is φ = 44395604920.

The previous prime is 44395604879. The next prime is 44395604951. The reversal of 44395604921 is 12940659344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28478250025 + 15917354896 = 168755^2 + 126164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44395604921 is a prime.

It is not a weakly prime, because it can be changed into another prime (44395604951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22197802460 + 22197802461.

It is an arithmetic number, because the mean of its divisors is an integer number (22197802461).

Almost surely, 2^44395604921 is an apocalyptic number.

It is an amenable number.

44395604921 is a deficient number, since it is larger than the sum of its proper divisors (1).

44395604921 is an equidigital number, since it uses as much as digits as its factorization.

44395604921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 44395604921 in words is "forty-four billion, three hundred ninety-five million, six hundred four thousand, nine hundred twenty-one".