11137543537 has 4 divisors (see below), whose sum is σ = 11138216176. Its totient is φ = 11136870900.

The previous prime is 11137543513. The next prime is 11137543553. The reversal of 11137543537 is 73534573111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73534573111 = 1831 ⋅40160881.

It is a cyclic number.

It is not a de Polignac number, because 11137543537 - 2¹⁹ = 11137019249 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 11137543537.

It is not an unprimeable number, because it can be changed into a prime (11137543597) 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, 310839 + ... + 344812.

It is an arithmetic number, because the mean of its divisors is an integer number (2784554044).

Almost surely, 2^11137543537 is an apocalyptic number.

It is an amenable number.

11137543537 is a deficient number, since it is larger than the sum of its proper divisors (672639).

11137543537 is an equidigital number, since it uses as much as digits as its factorization.

11137543537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672638.

The product of its digits is 132300, while the sum is 40.

The spelling of 11137543537 in words is "eleven billion, one hundred thirty-seven million, five hundred forty-three thousand, five hundred thirty-seven".