842599717668 has 18 divisors (see below), whose sum is σ = 2129904841974. Its totient is φ = 280866572544.

The previous prime is 842599717657. The next prime is 842599717717. The reversal of 842599717668 is 866717995248.

842599717668 is a `hidden beast` number, since 8 + 425 + 9 + 9 + 71 + 76 + 68 = 666.

842599717668 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 773938948644 + 68660769024 = 879738^2 + 262032^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×842599717668² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 842599717596 and 842599717605.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11702773821 + ... + 11702773892.

Almost surely, 2^842599717668 is an apocalyptic number.

It is an amenable number.

842599717668 is an abundant number, since it is smaller than the sum of its proper divisors (1287305124306).

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

842599717668 is a wasteful number, since it uses less digits than its factorization.

842599717668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23405547723 (or 23405547718 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 842599717668 in words is "eight hundred forty-two billion, five hundred ninety-nine million, seven hundred seventeen thousand, six hundred sixty-eight".