55506510561 has 16 divisors (see below), whose sum is σ = 74379210560. Its totient is φ = 36819282240.

The previous prime is 55506510523. The next prime is 55506510593. The reversal of 55506510561 is 16501560555.

It is not a de Polignac number, because 55506510561 - 2⁶ = 55506510497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55506510061) 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 15 ways as a sum of consecutive naturals, for example, 1088706 + ... + 1138548.

It is an arithmetic number, because the mean of its divisors is an integer number (4648700660).

Almost surely, 2^55506510561 is an apocalyptic number.

It is an amenable number.

55506510561 is a deficient number, since it is larger than the sum of its proper divisors (18872699999).

55506510561 is a wasteful number, since it uses less digits than its factorization.

55506510561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51696.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 55506510561 in words is "fifty-five billion, five hundred six million, five hundred ten thousand, five hundred sixty-one".