636085128378 has 16 divisors (see below), whose sum is σ = 1453908864960. Its totient is φ = 181738608096.

The previous prime is 636085128353. The next prime is 636085128391. The reversal of 636085128378 is 873821580636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7572441963 + ... + 7572442046.

It is an arithmetic number, because the mean of its divisors is an integer number (90869304060).

Almost surely, 2^636085128378 is an apocalyptic number.

636085128378 is an abundant number, since it is smaller than the sum of its proper divisors (817823736582).

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

636085128378 is a wasteful number, since it uses less digits than its factorization.

636085128378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15144884021.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 636085128378 in words is "six hundred thirty-six billion, eighty-five million, one hundred twenty-eight thousand, three hundred seventy-eight".