94440635621 has 4 divisors (see below), whose sum is σ = 94448413644. Its totient is φ = 94432857600.

The previous prime is 94440635603. The next prime is 94440635633. The reversal of 94440635621 is 12653604449.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12653604449 = 4493 ⋅2816293.

It can be written as a sum of positive squares in 2 ways, for example, as 9578536900 + 84862098721 = 97870^2 + 291311^2 .

It is a cyclic number.

It is not a de Polignac number, because 94440635621 - 2¹⁰ = 94440634597 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 (94440634621) 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, 3870770 + ... + 3895091.

It is an arithmetic number, because the mean of its divisors is an integer number (23612103411).

Almost surely, 2^94440635621 is an apocalyptic number.

It is an amenable number.

94440635621 is a deficient number, since it is larger than the sum of its proper divisors (7778023).

94440635621 is a wasteful number, since it uses less digits than its factorization.

94440635621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778022.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 94440635621 in words is "ninety-four billion, four hundred forty million, six hundred thirty-five thousand, six hundred twenty-one".