56632867909 has 4 divisors (see below), whose sum is σ = 56636991180. Its totient is φ = 56628744640.

The previous prime is 56632867867. The next prime is 56632867919. The reversal of 56632867909 is 90976823665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15293032225 + 41339835684 = 123665^2 + 203322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56632867909 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 (56632867919) 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, 2040964 + ... + 2068525.

It is an arithmetic number, because the mean of its divisors is an integer number (14159247795).

Almost surely, 2^56632867909 is an apocalyptic number.

It is an amenable number.

56632867909 is a deficient number, since it is larger than the sum of its proper divisors (4123271).

56632867909 is a wasteful number, since it uses less digits than its factorization.

56632867909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123270.

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 56632867909 in words is "fifty-six billion, six hundred thirty-two million, eight hundred sixty-seven thousand, nine hundred nine".