11937366638 has 4 divisors (see below), whose sum is σ = 17906049960. Its totient is φ = 5968683318.

The previous prime is 11937366619. The next prime is 11937366641. The reversal of 11937366638 is 83666373911.

It is a happy number.

11937366638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11937366638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2984341658 + ... + 2984341661.

It is an arithmetic number, because the mean of its divisors is an integer number (4476512490).

Almost surely, 2^11937366638 is an apocalyptic number.

11937366638 is a deficient number, since it is larger than the sum of its proper divisors (5968683322).

11937366638 is an equidigital number, since it uses as much as digits as its factorization.

11937366638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968683321.

The product of its digits is 2939328, while the sum is 53.

The spelling of 11937366638 in words is "eleven billion, nine hundred thirty-seven million, three hundred sixty-six thousand, six hundred thirty-eight".