6551560655503 has 4 divisors (see below), whose sum is σ = 6553817482608. Its totient is φ = 6549303828400.

The previous prime is 6551560655501. The next prime is 6551560655513. The reversal of 6551560655503 is 3055560651556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6551560655503 - 2¹ = 6551560655501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551560655501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128409198 + ... + 1128415003.

It is an arithmetic number, because the mean of its divisors is an integer number (1638454370652).

Almost surely, 2^{6551560655503} is an apocalyptic number.

6551560655503 is a deficient number, since it is larger than the sum of its proper divisors (2256827105).

6551560655503 is a wasteful number, since it uses less digits than its factorization.

6551560655503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256827104.

The product of its (nonzero) digits is 10125000, while the sum is 52.

The spelling of 6551560655503 in words is "six trillion, five hundred fifty-one billion, five hundred sixty million, six hundred fifty-five thousand, five hundred three".