442811690857818 has 16 divisors (see below), whose sum is σ = 984025979684160. Its totient is φ = 147603896952588.

The previous prime is 442811690857763. The next prime is 442811690857871. The reversal of 442811690857818 is 818758096118244.

442811690857818 is a `hidden beast` number, since 4 + 4 + 28 + 1 + 16 + 9 + 0 + 8 + 578 + 18 = 666.

It is a super-2 number, since 2×442811690857818² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4100108248630 + ... + 4100108248737.

It is an arithmetic number, because the mean of its divisors is an integer number (61501623730260).

Almost surely, 2^{442811690857818} is an apocalyptic number.

442811690857818 is an abundant number, since it is smaller than the sum of its proper divisors (541214288826342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442811690857818 is a wasteful number, since it uses less digits than its factorization.

442811690857818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8200216497378 (or 8200216497372 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 72.

The spelling of 442811690857818 in words is "four hundred forty-two trillion, eight hundred eleven billion, six hundred ninety million, eight hundred fifty-seven thousand, eight hundred eighteen".