56662171557 has 8 divisors (see below), whose sum is σ = 76398433920. Its totient is φ = 37350345120.

The previous prime is 56662171529. The next prime is 56662171561. The reversal of 56662171557 is 75517126665.

56662171557 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 not a de Polignac number, because 56662171557 - 2⁷ = 56662171429 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56662171057) 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, 106108669 + ... + 106109202.

It is an arithmetic number, because the mean of its divisors is an integer number (9549804240).

Almost surely, 2^56662171557 is an apocalyptic number.

It is an amenable number.

56662171557 is a deficient number, since it is larger than the sum of its proper divisors (19736262363).

56662171557 is a wasteful number, since it uses less digits than its factorization.

56662171557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212217963.

The product of its digits is 2646000, while the sum is 51.

The spelling of 56662171557 in words is "fifty-six billion, six hundred sixty-two million, one hundred seventy-one thousand, five hundred fifty-seven".