11545142017 has 4 divisors (see below), whose sum is σ = 12224268036. Its totient is φ = 10866016000.

The previous prime is 11545141999. The next prime is 11545142027. The reversal of 11545142017 is 71024154511.

It is a happy number.

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 10855764481 + 689377536 = 104191^2 + 26256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11545142017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11545142017.

It is not an unprimeable number, because it can be changed into a prime (11545142027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339562984 + ... + 339563017.

It is an arithmetic number, because the mean of its divisors is an integer number (3056067009).

Almost surely, 2^11545142017 is an apocalyptic number.

11545142017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

11545142017 is a deficient number, since it is larger than the sum of its proper divisors (679126019).

11545142017 is an equidigital number, since it uses as much as digits as its factorization.

11545142017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679126018.

The product of its (nonzero) digits is 5600, while the sum is 31.

Adding to 11545142017 its reverse (71024154511), we get a palindrome (82569296528).

The spelling of 11545142017 in words is "eleven billion, five hundred forty-five million, one hundred forty-two thousand, seventeen".