56386986161 has 4 divisors (see below), whose sum is σ = 61513075824. Its totient is φ = 51260896500.

The previous prime is 56386986143. The next prime is 56386986167. The reversal of 56386986161 is 16168968365.

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 de Polignac number, because none of the positive numbers 2^k-56386986161 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 56386986161.

It is not an unprimeable number, because it can be changed into a prime (56386986167) 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, 2563044815 + ... + 2563044836.

It is an arithmetic number, because the mean of its divisors is an integer number (15378268956).

Almost surely, 2^56386986161 is an apocalyptic number.

It is an amenable number.

56386986161 is a deficient number, since it is larger than the sum of its proper divisors (5126089663).

56386986161 is a wasteful number, since it uses less digits than its factorization.

56386986161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126089662.

The product of its digits is 11197440, while the sum is 59.

The spelling of 56386986161 in words is "fifty-six billion, three hundred eighty-six million, nine hundred eighty-six thousand, one hundred sixty-one".