11528167493509 has 2 divisors, whose sum is σ = 11528167493510. Its totient is φ = 11528167493508.

The previous prime is 11528167493477. The next prime is 11528167493569. The reversal of 11528167493509 is 90539476182511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10023872602500 + 1504294891009 = 3166050^2 + 1226497^2 .

It is a cyclic number.

It is not a de Polignac number, because 11528167493509 - 2⁵ = 11528167493477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11528167493569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5764083746754 + 5764083746755.

It is an arithmetic number, because the mean of its divisors is an integer number (5764083746755).

It is a 2-persistent number, because it is pandigital, and so is 2⋅11528167493509 = 23056334987018, but 3⋅11528167493509 = 34584502480527 is not.

Almost surely, 2^{11528167493509} is an apocalyptic number.

It is an amenable number.

11528167493509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11528167493509 is an equidigital number, since it uses as much as digits as its factorization.

11528167493509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 11528167493509 in words is "eleven trillion, five hundred twenty-eight billion, one hundred sixty-seven million, four hundred ninety-three thousand, five hundred nine".