12215085618 has 16 divisors (see below), whose sum is σ = 24439255200. Its totient is φ = 4070181216.

The previous prime is 12215085593. The next prime is 12215085629. The reversal of 12215085618 is 81658051221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360955 + ... + 393342.

It is an arithmetic number, because the mean of its divisors is an integer number (1527453450).

Almost surely, 2^12215085618 is an apocalyptic number.

12215085618 is an abundant number, since it is smaller than the sum of its proper divisors (12224169582).

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

12215085618 is a wasteful number, since it uses less digits than its factorization.

12215085618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757001.

The product of its (nonzero) digits is 38400, while the sum is 39.

The spelling of 12215085618 in words is "twelve billion, two hundred fifteen million, eighty-five thousand, six hundred eighteen".