556687786655 has 32 divisors (see below), whose sum is σ = 896929141248. Its totient is φ = 320331830400.

The previous prime is 556687786651. The next prime is 556687786691.

556687786655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 556687786655 - 2² = 556687786651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556687786651) 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 31 ways as a sum of consecutive naturals, for example, 55608161 + ... + 55618170.

It is an arithmetic number, because the mean of its divisors is an integer number (28029035664).

Almost surely, 2^556687786655 is an apocalyptic number.

556687786655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

556687786655 is a deficient number, since it is larger than the sum of its proper divisors (340241354593).

556687786655 is a wasteful number, since it uses less digits than its factorization.

556687786655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111226367.

The product of its digits is 2540160000, while the sum is 74.

The spelling of 556687786655 in words is "five hundred fifty-six billion, six hundred eighty-seven million, seven hundred eighty-six thousand, six hundred fifty-five".