11216657537 has 4 divisors (see below), whose sum is σ = 11239690176. Its totient is φ = 11193624900.

The previous prime is 11216657521. The next prime is 11216657563. The reversal of 11216657537 is 73575661211.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11216657537 - 2⁴ = 11216657521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11216657567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11515589 + ... + 11516562.

It is an arithmetic number, because the mean of its divisors is an integer number (2809922544).

Almost surely, 2^11216657537 is an apocalyptic number.

It is an amenable number.

11216657537 is a deficient number, since it is larger than the sum of its proper divisors (23032639).

11216657537 is an equidigital number, since it uses as much as digits as its factorization.

11216657537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23032638.

The product of its digits is 264600, while the sum is 44.

The spelling of 11216657537 in words is "eleven billion, two hundred sixteen million, six hundred fifty-seven thousand, five hundred thirty-seven".