56535577667 has 4 divisors (see below), whose sum is σ = 56589992160. Its totient is φ = 56481163176.

The previous prime is 56535577663. The next prime is 56535577669. The reversal of 56535577667 is 76677553565.

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

It is a cyclic number.

It is not a de Polignac number, because 56535577667 - 2² = 56535577663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56535577663) 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, 27205688 + ... + 27207765.

It is an arithmetic number, because the mean of its divisors is an integer number (14147498040).

Almost surely, 2^56535577667 is an apocalyptic number.

56535577667 is a deficient number, since it is larger than the sum of its proper divisors (54414493).

56535577667 is a wasteful number, since it uses less digits than its factorization.

56535577667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54414492.

The product of its digits is 138915000, while the sum is 62.

The spelling of 56535577667 in words is "fifty-six billion, five hundred thirty-five million, five hundred seventy-seven thousand, six hundred sixty-seven".