55511050561 has 8 divisors (see below), whose sum is σ = 55622393064. Its totient is φ = 55399751040.

The previous prime is 55511050499. The next prime is 55511050577. The reversal of 55511050561 is 16505011555.

It can be written as a sum of positive squares in 4 ways, for example, as 18777494961 + 36733555600 = 137031^2 + 191660^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55511050561 - 2⁷ = 55511050433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55511050061) 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 7 ways as a sum of consecutive naturals, for example, 4070991 + ... + 4084603.

It is an arithmetic number, because the mean of its divisors is an integer number (6952799133).

Almost surely, 2^55511050561 is an apocalyptic number.

It is an amenable number.

55511050561 is a deficient number, since it is larger than the sum of its proper divisors (111342503).

55511050561 is a wasteful number, since it uses less digits than its factorization.

55511050561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21491.

The product of its (nonzero) digits is 18750, while the sum is 34.

The spelling of 55511050561 in words is "fifty-five billion, five hundred eleven million, fifty thousand, five hundred sixty-one".