11667238618 has 16 divisors (see below), whose sum is σ = 21177509184. Its totient is φ = 4706112960.

The previous prime is 11667238519. The next prime is 11667238619. The reversal of 11667238618 is 81683276611.

It is a happy number.

It is a super-2 number, since 2×11667238618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11667238619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24510768 + ... + 24511243.

It is an arithmetic number, because the mean of its divisors is an integer number (1323594324).

Almost surely, 2^11667238618 is an apocalyptic number.

11667238618 is a deficient number, since it is larger than the sum of its proper divisors (9510270566).

11667238618 is a wasteful number, since it uses less digits than its factorization.

11667238618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49022037.

The product of its digits is 580608, while the sum is 49.

The spelling of 11667238618 in words is "eleven billion, six hundred sixty-seven million, two hundred thirty-eight thousand, six hundred eighteen".