11485545581 has 8 divisors (see below), whose sum is σ = 12615702720. Its totient is φ = 10407953952.

The previous prime is 11485545569. The next prime is 11485545629. The reversal of 11485545581 is 18554558411.

It is a happy number.

11485545581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11485545581 - 2¹⁸ = 11485283437 is a prime.

It is a super-2 number, since 2×11485545581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11485545541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13140920 + ... + 13141793.

It is an arithmetic number, because the mean of its divisors is an integer number (1576962840).

Almost surely, 2^11485545581 is an apocalyptic number.

It is an amenable number.

11485545581 is a deficient number, since it is larger than the sum of its proper divisors (1130157139).

11485545581 is a wasteful number, since it uses less digits than its factorization.

11485545581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26282755.

The product of its digits is 640000, while the sum is 47.

The spelling of 11485545581 in words is "eleven billion, four hundred eighty-five million, five hundred forty-five thousand, five hundred eighty-one".