11858181872 has 40 divisors (see below), whose sum is σ = 23355171840. Its totient is φ = 5831616960.

The previous prime is 11858181869. The next prime is 11858181961. The reversal of 11858181872 is 27818185811.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11858181872.

It is a congruent number.

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, 314597 + ... + 350267.

It is an arithmetic number, because the mean of its divisors is an integer number (583879296).

Almost surely, 2^11858181872 is an apocalyptic number.

It is an amenable number.

11858181872 is a deficient number, since it is larger than the sum of its proper divisors (11496989968).

11858181872 is a wasteful number, since it uses less digits than its factorization.

11858181872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36021 (or 36015 counting only the distinct ones).

The product of its digits is 286720, while the sum is 50.

The spelling of 11858181872 in words is "eleven billion, eight hundred fifty-eight million, one hundred eighty-one thousand, eight hundred seventy-two".