56815535909 has 8 divisors (see below), whose sum is σ = 61989127200. Its totient is φ = 51643368400.

The previous prime is 56815535873. The next prime is 56815535929. The reversal of 56815535909 is 90953551865.

56815535909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56815535909 - 2⁸ = 56815535653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56815535929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271634 + ... + 432915.

It is an arithmetic number, because the mean of its divisors is an integer number (7748640900).

Almost surely, 2^56815535909 is an apocalyptic number.

It is an amenable number.

56815535909 is a deficient number, since it is larger than the sum of its proper divisors (5173591291).

56815535909 is a wasteful number, since it uses less digits than its factorization.

56815535909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711891.

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 56815535909 in words is "fifty-six billion, eight hundred fifteen million, five hundred thirty-five thousand, nine hundred nine".