55661016655 has 8 divisors (see below), whose sum is σ = 66798961200. Its totient is φ = 44524985856.

The previous prime is 55661016613. The next prime is 55661016659.

55661016655 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55661016655 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55661016659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413650 + ... + 531439.

It is an arithmetic number, because the mean of its divisors is an integer number (8349870150).

Almost surely, 2^55661016655 is an apocalyptic number.

55661016655 is a deficient number, since it is larger than the sum of its proper divisors (11137944545).

55661016655 is a wasteful number, since it uses less digits than its factorization.

55661016655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956873.

The product of its (nonzero) digits is 810000, while the sum is 46.

Subtracting from 55661016655 its product of nonzero digits (810000), we obtain a palindrome (55660206655).

The spelling of 55661016655 in words is "fifty-five billion, six hundred sixty-one million, sixteen thousand, six hundred fifty-five".