11972745206 has 4 divisors (see below), whose sum is σ = 17959117812. Its totient is φ = 5986372602.

The previous prime is 11972745199. The next prime is 11972745221. The reversal of 11972745206 is 60254727911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2993186300 + ... + 2993186303.

It is an arithmetic number, because the mean of its divisors is an integer number (4489779453).

Almost surely, 2^11972745206 is an apocalyptic number.

11972745206 is a deficient number, since it is larger than the sum of its proper divisors (5986372606).

11972745206 is an equidigital number, since it uses as much as digits as its factorization.

11972745206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986372605.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 11972745206 in words is "eleven billion, nine hundred seventy-two million, seven hundred forty-five thousand, two hundred six".