11771900671 has 4 divisors (see below), whose sum is σ = 11773975600. Its totient is φ = 11769825744.

The previous prime is 11771900659. The next prime is 11771900681. The reversal of 11771900671 is 17600917711.

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

It is a cyclic number.

It is not a de Polignac number, because 11771900671 - 2¹¹ = 11771898623 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 (11771900681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028931 + ... + 1040308.

It is an arithmetic number, because the mean of its divisors is an integer number (2943493900).

Almost surely, 2^11771900671 is an apocalyptic number.

11771900671 is a deficient number, since it is larger than the sum of its proper divisors (2074929).

11771900671 is an equidigital number, since it uses as much as digits as its factorization.

11771900671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074928.

The product of its (nonzero) digits is 18522, while the sum is 40.

The spelling of 11771900671 in words is "eleven billion, seven hundred seventy-one million, nine hundred thousand, six hundred seventy-one".