11771177649 has 16 divisors (see below), whose sum is σ = 19567672320. Its totient is φ = 6114897360.

The previous prime is 11771177629. The next prime is 11771177653. The reversal of 11771177649 is 94677117711.

It is not a de Polignac number, because 11771177649 - 2⁸ = 11771177393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11771177629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25478509 + ... + 25478970.

It is an arithmetic number, because the mean of its divisors is an integer number (1222979520).

Almost surely, 2^11771177649 is an apocalyptic number.

It is an amenable number.

11771177649 is a deficient number, since it is larger than the sum of its proper divisors (7796494671).

11771177649 is a wasteful number, since it uses less digits than its factorization.

11771177649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50957500.

The product of its digits is 518616, while the sum is 51.

It can be divided in two parts, 11771 and 177649, that added together give a triangular number (189420 = T₆₁₅).

The spelling of 11771177649 in words is "eleven billion, seven hundred seventy-one million, one hundred seventy-seven thousand, six hundred forty-nine".