11166420545 has 32 divisors (see below), whose sum is σ = 15574440192. Its totient is φ = 7527416832.

The previous prime is 11166420541. The next prime is 11166420569. The reversal of 11166420545 is 54502466111.

It is a cyclic number.

It is not a de Polignac number, because 11166420545 - 2² = 11166420541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11166420541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 792734 + ... + 806696.

It is an arithmetic number, because the mean of its divisors is an integer number (486701256).

Almost surely, 2^11166420545 is an apocalyptic number.

It is an amenable number.

11166420545 is a deficient number, since it is larger than the sum of its proper divisors (4408019647).

11166420545 is a wasteful number, since it uses less digits than its factorization.

11166420545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14361.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 11166420545 its reverse (54502466111), we get a palindrome (65668886656).

The spelling of 11166420545 in words is "eleven billion, one hundred sixty-six million, four hundred twenty thousand, five hundred forty-five".