11997461890 has 32 divisors (see below), whose sum is σ = 21772146816. Its totient is φ = 4759814400.

The previous prime is 11997461881. The next prime is 11997461893. The reversal of 11997461890 is 9816479911.

11997461890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11997461893) 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 15 ways as a sum of consecutive naturals, for example, 1025514 + ... + 1037146.

It is an arithmetic number, because the mean of its divisors is an integer number (680379588).

Almost surely, 2^11997461890 is an apocalyptic number.

11997461890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11997461890 is a deficient number, since it is larger than the sum of its proper divisors (9774684926).

11997461890 is a wasteful number, since it uses less digits than its factorization.

11997461890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12474.

The product of its (nonzero) digits is 979776, while the sum is 55.

The spelling of 11997461890 in words is "eleven billion, nine hundred ninety-seven million, four hundred sixty-one thousand, eight hundred ninety".