56161510117 has 4 divisors (see below), whose sum is σ = 56302975276. Its totient is φ = 56020044960.

The previous prime is 56161510079. The next prime is 56161510121. The reversal of 56161510117 is 71101516165.

It is a happy number.

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 47599894276 + 8561615841 = 218174^2 + 92529^2 .

It is a cyclic number.

It is not a de Polignac number, because 56161510117 - 2²⁷ = 56027292389 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 (56161510187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70731984 + ... + 70732777.

It is an arithmetic number, because the mean of its divisors is an integer number (14075743819).

Almost surely, 2^56161510117 is an apocalyptic number.

It is an amenable number.

56161510117 is a deficient number, since it is larger than the sum of its proper divisors (141465159).

56161510117 is a wasteful number, since it uses less digits than its factorization.

56161510117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141465158.

The product of its (nonzero) digits is 6300, while the sum is 34.

The spelling of 56161510117 in words is "fifty-six billion, one hundred sixty-one million, five hundred ten thousand, one hundred seventeen".