56636437243 has 4 divisors (see below), whose sum is σ = 56636984008. Its totient is φ = 56635890480.

The previous prime is 56636437201. The next prime is 56636437259. The reversal of 56636437243 is 34273463665.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56636437243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56636437343) 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, 65121 + ... + 342802.

It is an arithmetic number, because the mean of its divisors is an integer number (14159246002).

Almost surely, 2^56636437243 is an apocalyptic number.

56636437243 is a deficient number, since it is larger than the sum of its proper divisors (546765).

56636437243 is a wasteful number, since it uses less digits than its factorization.

56636437243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546764.

The product of its digits is 6531840, while the sum is 49.

The spelling of 56636437243 in words is "fifty-six billion, six hundred thirty-six million, four hundred thirty-seven thousand, two hundred forty-three".