11507545477 has 4 divisors (see below), whose sum is σ = 11904357420. Its totient is φ = 11110733536.

The previous prime is 11507545397. The next prime is 11507545493. The reversal of 11507545477 is 77454570511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5816502756 + 5691042721 = 76266^2 + 75439^2 .

It is a cyclic number.

It is not a de Polignac number, because 11507545477 - 2¹¹ = 11507543429 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 (11507545877) 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 3 ways as a sum of consecutive naturals, for example, 198405928 + ... + 198405985.

It is an arithmetic number, because the mean of its divisors is an integer number (2976089355).

Almost surely, 2^11507545477 is an apocalyptic number.

It is an amenable number.

11507545477 is a deficient number, since it is larger than the sum of its proper divisors (396811943).

11507545477 is an equidigital number, since it uses as much as digits as its factorization.

11507545477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396811942.

The product of its (nonzero) digits is 686000, while the sum is 46.

The spelling of 11507545477 in words is "eleven billion, five hundred seven million, five hundred forty-five thousand, four hundred seventy-seven".