11812971966 has 16 divisors (see below), whose sum is σ = 23627144064. Its totient is φ = 3937457304.

The previous prime is 11812971931. The next prime is 11812971967. The reversal of 11812971966 is 66917921811.

11812971966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812971967) 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 7 ways as a sum of consecutive naturals, for example, 125151 + ... + 198213.

It is an arithmetic number, because the mean of its divisors is an integer number (1476696504).

Almost surely, 2^11812971966 is an apocalyptic number.

11812971966 is an abundant number, since it is smaller than the sum of its proper divisors (11814172098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11812971966 is a wasteful number, since it uses less digits than its factorization.

11812971966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100015.

The product of its digits is 326592, while the sum is 51.

The spelling of 11812971966 in words is "eleven billion, eight hundred twelve million, nine hundred seventy-one thousand, nine hundred sixty-six".