442663405320661 has 8 divisors (see below), whose sum is σ = 505903077028224. Its totient is φ = 379424244207120.

The previous prime is 442663405320659. The next prime is 442663405320671. The reversal of 442663405320661 is 166023504366244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442663405320661 - 2¹ = 442663405320659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442663405320599 and 442663405320608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442663405320671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125788930 + ... + 129260131.

It is an arithmetic number, because the mean of its divisors is an integer number (63237884628528).

Almost surely, 2^{442663405320661} is an apocalyptic number.

It is an amenable number.

442663405320661 is a deficient number, since it is larger than the sum of its proper divisors (63239671707563).

442663405320661 is a wasteful number, since it uses less digits than its factorization.

442663405320661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255297011.

The product of its (nonzero) digits is 14929920, while the sum is 52.

The spelling of 442663405320661 in words is "four hundred forty-two trillion, six hundred sixty-three billion, four hundred five million, three hundred twenty thousand, six hundred sixty-one".