442944325657 has 16 divisors (see below), whose sum is σ = 459947830032. Its totient is φ = 426222397440.

The previous prime is 442944325631. The next prime is 442944325687. The reversal of 442944325657 is 756523449244.

It can be written as a sum of positive squares in 8 ways, for example, as 19580684761 + 423363640896 = 139931^2 + 650664^2 .

It is a cyclic number.

It is not a de Polignac number, because 442944325657 - 2¹¹ = 442944323609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442944325598 and 442944325607.

It is not an unprimeable number, because it can be changed into a prime (442944325687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1794807 + ... + 2026627.

It is an arithmetic number, because the mean of its divisors is an integer number (28746739377).

Almost surely, 2^442944325657 is an apocalyptic number.

It is an amenable number.

442944325657 is a deficient number, since it is larger than the sum of its proper divisors (17003504375).

442944325657 is a wasteful number, since it uses less digits than its factorization.

442944325657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232428.

The product of its digits is 29030400, while the sum is 55.

The spelling of 442944325657 in words is "four hundred forty-two billion, nine hundred forty-four million, three hundred twenty-five thousand, six hundred fifty-seven".