655856585658556 has 6 divisors (see below), whose sum is σ = 1147749024902480. Its totient is φ = 327928292829276.

The previous prime is 655856585658487. The next prime is 655856585658559.

It is a happy number.

655856585658556 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655856585658559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81982073207316 + ... + 81982073207323.

Almost surely, 2^{655856585658556} is an apocalyptic number.

It is an amenable number.

655856585658556 is a deficient number, since it is larger than the sum of its proper divisors (491892439243924).

655856585658556 is a wasteful number, since it uses less digits than its factorization.

655856585658556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163964146414643 (or 163964146414641 counting only the distinct ones).

The product of its digits is 259200000000, while the sum is 88.

The spelling of 655856585658556 in words is "six hundred fifty-five trillion, eight hundred fifty-six billion, five hundred eighty-five million, six hundred fifty-eight thousand, five hundred fifty-six".