11972424618 has 96 divisors (see below), whose sum is σ = 33421772160. Its totient is φ = 3109708800.

The previous prime is 11972424587. The next prime is 11972424619. The reversal of 11972424618 is 81642427911.

11972424618 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 2 + 4 + 24 + 618 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (11972424619) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85143 + ... + 176618.

It is an arithmetic number, because the mean of its divisors is an integer number (348143460).

Almost surely, 2^11972424618 is an apocalyptic number.

11972424618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11972424618 is an abundant number, since it is smaller than the sum of its proper divisors (21449347542).

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

11972424618 is a wasteful number, since it uses less digits than its factorization.

11972424618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261801 (or 261784 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 11972424618 in words is "eleven billion, nine hundred seventy-two million, four hundred twenty-four thousand, six hundred eighteen".