11961049671 has 6 divisors (see below), whose sum is σ = 17277071760. Its totient is φ = 7974033108.

The previous prime is 11961049637. The next prime is 11961049729. The reversal of 11961049671 is 17694016911.

11961049671 is a `hidden beast` number, since 1 + 1 + 96 + 1 + 0 + 496 + 71 = 666.

11961049671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11961049671 - 2¹⁰ = 11961048647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11961049621) 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 5 ways as a sum of consecutive naturals, for example, 664502751 + ... + 664502768.

It is an arithmetic number, because the mean of its divisors is an integer number (2879511960).

Almost surely, 2^11961049671 is an apocalyptic number.

11961049671 is a deficient number, since it is larger than the sum of its proper divisors (5316022089).

11961049671 is a wasteful number, since it uses less digits than its factorization.

11961049671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329005525 (or 1329005522 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 11961049671 in words is "eleven billion, nine hundred sixty-one million, forty-nine thousand, six hundred seventy-one".