11775406545 has 48 divisors (see below), whose sum is σ = 23494423680. Its totient is φ = 5344296192.

The previous prime is 11775406543. The next prime is 11775406549. The reversal of 11775406545 is 54560457711.

11775406545 is a `hidden beast` number, since 1 + 1 + 7 + 7 + 540 + 65 + 45 = 666.

It is not a de Polignac number, because 11775406545 - 2¹ = 11775406543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11775406545.

It is not an unprimeable number, because it can be changed into a prime (11775406543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90684 + ... + 178253.

It is an arithmetic number, because the mean of its divisors is an integer number (489467160).

Almost surely, 2^11775406545 is an apocalyptic number.

11775406545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11775406545 is a deficient number, since it is larger than the sum of its proper divisors (11719017135).

11775406545 is a wasteful number, since it uses less digits than its factorization.

11775406545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269094 (or 269091 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 45.

The spelling of 11775406545 in words is "eleven billion, seven hundred seventy-five million, four hundred six thousand, five hundred forty-five".