11971761172 has 48 divisors (see below), whose sum is σ = 24239996928. Its totient is φ = 5067588960.

The previous prime is 11971761127. The next prime is 11971761203. The reversal of 11971761172 is 27116717911.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799797 + ... + 814627.

It is an arithmetic number, because the mean of its divisors is an integer number (504999936).

Almost surely, 2^11971761172 is an apocalyptic number.

It is an amenable number.

11971761172 is an abundant number, since it is smaller than the sum of its proper divisors (12268235756).

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

11971761172 is a wasteful number, since it uses less digits than its factorization.

11971761172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15196 (or 15194 counting only the distinct ones).

The product of its digits is 37044, while the sum is 43.

The spelling of 11971761172 in words is "eleven billion, nine hundred seventy-one million, seven hundred sixty-one thousand, one hundred seventy-two".