11521777071 has 32 divisors (see below), whose sum is σ = 18007861248. Its totient is φ = 6416006400.

The previous prime is 11521777049. The next prime is 11521777117. The reversal of 11521777071 is 17077712511.

It is not a de Polignac number, because 11521777071 - 2⁹ = 11521776559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521777571) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 204921 + ... + 255021.

It is an arithmetic number, because the mean of its divisors is an integer number (562745664).

Almost surely, 2^11521777071 is an apocalyptic number.

11521777071 is a deficient number, since it is larger than the sum of its proper divisors (6486084177).

11521777071 is a wasteful number, since it uses less digits than its factorization.

11521777071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50391.

The product of its (nonzero) digits is 24010, while the sum is 39.

The spelling of 11521777071 in words is "eleven billion, five hundred twenty-one million, seven hundred seventy-seven thousand, seventy-one".