11131455537 has 24 divisors (see below), whose sum is σ = 17062069024. Its totient is φ = 7248382848.

The previous prime is 11131455499. The next prime is 11131455557. The reversal of 11131455537 is 73555413111.

11131455537 is a `hidden beast` number, since 1 + 113 + 1 + 4 + 5 + 5 + 537 = 666.

It is not a de Polignac number, because 11131455537 - 2⁷ = 11131455409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131455557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 522208 + ... + 543105.

Almost surely, 2^11131455537 is an apocalyptic number.

It is an amenable number.

11131455537 is a deficient number, since it is larger than the sum of its proper divisors (5930613487).

11131455537 is an equidigital number, since it uses as much as digits as its factorization.

11131455537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065371 (or 1065359 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

Adding to 11131455537 its reverse (73555413111), we get a palindrome (84686868648).

The spelling of 11131455537 in words is "eleven billion, one hundred thirty-one million, four hundred fifty-five thousand, five hundred thirty-seven".