442166799523 has 8 divisors (see below), whose sum is σ = 465616640720. Its totient is φ = 418734748800.

The previous prime is 442166799499. The next prime is 442166799577. The reversal of 442166799523 is 325997661244.

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

It is a cyclic number.

It is not a de Polignac number, because 442166799523 - 2⁵ = 442166799491 is a prime.

It is a super-2 number, since 2×442166799523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442166799323) 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, 4396578 + ... + 4496023.

It is an arithmetic number, because the mean of its divisors is an integer number (58202080090).

Almost surely, 2^442166799523 is an apocalyptic number.

442166799523 is a deficient number, since it is larger than the sum of its proper divisors (23449841197).

442166799523 is a wasteful number, since it uses less digits than its factorization.

442166799523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8895237.

The product of its digits is 19595520, while the sum is 58.

The spelling of 442166799523 in words is "four hundred forty-two billion, one hundred sixty-six million, seven hundred ninety-nine thousand, five hundred twenty-three".