11971009990 has 8 divisors (see below), whose sum is σ = 21547818000. Its totient is φ = 4788403992.

The previous prime is 11971009961. The next prime is 11971009993. The reversal of 11971009990 is 9990017911.

It is a happy number.

11971009990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11971009990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971009993) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 598550490 + ... + 598550509.

It is an arithmetic number, because the mean of its divisors is an integer number (2693477250).

Almost surely, 2^11971009990 is an apocalyptic number.

11971009990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11971009990 is a deficient number, since it is larger than the sum of its proper divisors (9576808010).

11971009990 is a wasteful number, since it uses less digits than its factorization.

11971009990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197101006.

The product of its (nonzero) digits is 45927, while the sum is 46.

The spelling of 11971009990 in words is "eleven billion, nine hundred seventy-one million, nine thousand, nine hundred ninety".