11875721421766 has 16 divisors (see below), whose sum is σ = 17945100450000. Its totient is φ = 5894074445728.

The previous prime is 11875721421719. The next prime is 11875721421803. The reversal of 11875721421766 is 66712412757811.

It is a self number, because there is not a number n which added to its sum of digits gives 11875721421766.

It is a congruent number.

It is an unprimeable number.

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, 12845965 + ... + 13739368.

It is an arithmetic number, because the mean of its divisors is an integer number (1121568778125).

Almost surely, 2^{11875721421766} is an apocalyptic number.

11875721421766 is a deficient number, since it is larger than the sum of its proper divisors (6069379028234).

11875721421766 is a wasteful number, since it uses less digits than its factorization.

11875721421766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26586983.

The product of its digits is 7902720, while the sum is 58.

The spelling of 11875721421766 in words is "eleven trillion, eight hundred seventy-five billion, seven hundred twenty-one million, four hundred twenty-one thousand, seven hundred sixty-six".