56000161505 has 4 divisors (see below), whose sum is σ = 67200193812. Its totient is φ = 44800129200.

The previous prime is 56000161489. The next prime is 56000161507. The reversal of 56000161505 is 50516100065.

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 36814864384 + 19185297121 = 191872^2 + 138511^2 .

It is not a de Polignac number, because 56000161505 - 2⁴ = 56000161489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56000161507) 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, 5600016146 + ... + 5600016155.

It is an arithmetic number, because the mean of its divisors is an integer number (16800048453).

Almost surely, 2^56000161505 is an apocalyptic number.

It is an amenable number.

56000161505 is a deficient number, since it is larger than the sum of its proper divisors (11200032307).

56000161505 is a wasteful number, since it uses less digits than its factorization.

56000161505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11200032306.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 56000161505 in words is "fifty-six billion, one hundred sixty-one thousand, five hundred five".