869918863842 has 48 divisors (see below), whose sum is σ = 2154148805952. Its totient is φ = 248540862240.

The previous prime is 869918863837. The next prime is 869918863889. The reversal of 869918863842 is 248368819968.

869918863842 is a `hidden beast` number, since 8 + 69 + 9 + 188 + 6 + 384 + 2 = 666.

It is a super-2 number, since 2×869918863842² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5265717 + ... + 5428407.

It is an arithmetic number, because the mean of its divisors is an integer number (44878100124).

Almost surely, 2^869918863842 is an apocalyptic number.

869918863842 is an abundant number, since it is smaller than the sum of its proper divisors (1284229942110).

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

869918863842 is a wasteful number, since it uses less digits than its factorization.

869918863842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205143 (or 205140 counting only the distinct ones).

The product of its digits is 286654464, while the sum is 72.

The spelling of 869918863842 in words is "eight hundred sixty-nine billion, nine hundred eighteen million, eight hundred sixty-three thousand, eight hundred forty-two".