56561015061 has 12 divisors (see below), whose sum is σ = 86505082092. Its totient is φ = 35489264256.

The previous prime is 56561015011. The next prime is 56561015101. The reversal of 56561015061 is 16051016565.

It can be written as a sum of positive squares in 2 ways, for example, as 46818140625 + 9742874436 = 216375^2 + 98706^2 .

It is not a de Polignac number, because 56561015061 - 2¹¹ = 56561013013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56561015011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184839766 + ... + 184840071.

It is an arithmetic number, because the mean of its divisors is an integer number (7208756841).

Almost surely, 2^56561015061 is an apocalyptic number.

56561015061 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56561015061 is a deficient number, since it is larger than the sum of its proper divisors (29944067031).

56561015061 is a wasteful number, since it uses less digits than its factorization.

56561015061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369679860 (or 369679857 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 56561015061 in words is "fifty-six billion, five hundred sixty-one million, fifteen thousand, sixty-one".