816539935618 has 16 divisors (see below), whose sum is σ = 1349385531840. Its totient is φ = 367479718000.

The previous prime is 816539935609. The next prime is 816539935661.

816539935618 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 816539935618.

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 7 ways as a sum of consecutive naturals, for example, 183737638 + ... + 183742081.

It is an arithmetic number, because the mean of its divisors is an integer number (84336595740).

Almost surely, 2^816539935618 is an apocalyptic number.

816539935618 is a deficient number, since it is larger than the sum of its proper divisors (532845596222).

816539935618 is a wasteful number, since it uses less digits than its factorization.

816539935618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367479833.

The product of its digits is 41990400, while the sum is 64.

The spelling of 816539935618 in words is "eight hundred sixteen billion, five hundred thirty-nine million, nine hundred thirty-five thousand, six hundred eighteen".