655965569555 has 4 divisors (see below), whose sum is σ = 787158683472. Its totient is φ = 524772455640.

The previous prime is 655965569543. The next prime is 655965569557. The reversal of 655965569555 is 555965569556.

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

It is not a de Polignac number, because 655965569555 - 2⁸ = 655965569299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655965569557) 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, 65596556951 + ... + 65596556960.

It is an arithmetic number, because the mean of its divisors is an integer number (196789670868).

Almost surely, 2^655965569555 is an apocalyptic number.

655965569555 is a deficient number, since it is larger than the sum of its proper divisors (131193113917).

655965569555 is a wasteful number, since it uses less digits than its factorization.

655965569555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131193113916.

The product of its digits is 1366875000, while the sum is 71.

Subtracting from 655965569555 its reverse (555965569556), we obtain a palindrome (99999999999).

The spelling of 655965569555 in words is "six hundred fifty-five billion, nine hundred sixty-five million, five hundred sixty-nine thousand, five hundred fifty-five".