636285558942 has 48 divisors (see below), whose sum is σ = 1504207551600. Its totient is φ = 192780489600.

The previous prime is 636285558871. The next prime is 636285558943. The reversal of 636285558942 is 249855582636.

636285558942 is a `hidden beast` number, since 6 + 3 + 6 + 2 + 8 + 5 + 5 + 589 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 636285558942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636285558943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 883392 + ... + 1432812.

It is an arithmetic number, because the mean of its divisors is an integer number (31337657325).

Almost surely, 2^636285558942 is an apocalyptic number.

636285558942 is an abundant number, since it is smaller than the sum of its proper divisors (867921992658).

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

636285558942 is a wasteful number, since it uses less digits than its factorization.

636285558942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555289 (or 555286 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 63.

The spelling of 636285558942 in words is "six hundred thirty-six billion, two hundred eighty-five million, five hundred fifty-eight thousand, nine hundred forty-two".