11989166837 has 4 divisors (see below), whose sum is σ = 12051937536. Its totient is φ = 11926396140.

The previous prime is 11989166807. The next prime is 11989166911. The reversal of 11989166837 is 73866198911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11989166837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989166807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31385063 + ... + 31385444.

It is an arithmetic number, because the mean of its divisors is an integer number (3012984384).

Almost surely, 2^11989166837 is an apocalyptic number.

It is an amenable number.

11989166837 is a deficient number, since it is larger than the sum of its proper divisors (62770699).

11989166837 is an equidigital number, since it uses as much as digits as its factorization.

11989166837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62770698.

The product of its digits is 3919104, while the sum is 59.

The spelling of 11989166837 in words is "eleven billion, nine hundred eighty-nine million, one hundred sixty-six thousand, eight hundred thirty-seven".