11936564837 has 4 divisors (see below), whose sum is σ = 12052453920. Its totient is φ = 11820675756.

The previous prime is 11936564831. The next prime is 11936564869. The reversal of 11936564837 is 73846563911.

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: 73846563911 = 349 ⋅211594739.

It is a cyclic number.

It is not a de Polignac number, because 11936564837 - 2¹⁰ = 11936563813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11936564831) 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, 57944387 + ... + 57944592.

It is an arithmetic number, because the mean of its divisors is an integer number (3013113480).

Almost surely, 2^11936564837 is an apocalyptic number.

It is an amenable number.

11936564837 is a deficient number, since it is larger than the sum of its proper divisors (115889083).

11936564837 is a wasteful number, since it uses less digits than its factorization.

11936564837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115889082.

The product of its digits is 3265920, while the sum is 53.

The spelling of 11936564837 in words is "eleven billion, nine hundred thirty-six million, five hundred sixty-four thousand, eight hundred thirty-seven".