1656243355855 has 16 divisors (see below), whose sum is σ = 2173834174464. Its totient is φ = 1201395592480.

The previous prime is 1656243355729. The next prime is 1656243355861. The reversal of 1656243355855 is 5585533426561.

It is a de Polignac number, because none of the positive numbers 2^k-1656243355855 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1656243355855.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39291619 + ... + 39333748.

It is an arithmetic number, because the mean of its divisors is an integer number (135864635904).

Almost surely, 2^{1656243355855} is an apocalyptic number.

1656243355855 is a deficient number, since it is larger than the sum of its proper divisors (517590818609).

1656243355855 is a wasteful number, since it uses less digits than its factorization.

1656243355855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78625766.

The product of its digits is 64800000, while the sum is 58.

The spelling of 1656243355855 in words is "one trillion, six hundred fifty-six billion, two hundred forty-three million, three hundred fifty-five thousand, eight hundred fifty-five".