6556780223455 has 48 divisors (see below), whose sum is σ = 9985204368000. Its totient is φ = 4087176475200.

The previous prime is 6556780223443. The next prime is 6556780223489. The reversal of 6556780223455 is 5543220876556.

It is not a de Polignac number, because 6556780223455 - 2¹⁵ = 6556780190687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6556780223455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117201840 + ... + 117257770.

It is an arithmetic number, because the mean of its divisors is an integer number (208025091000).

Almost surely, 2^{6556780223455} is an apocalyptic number.

6556780223455 is a deficient number, since it is larger than the sum of its proper divisors (3428424144545).

6556780223455 is a wasteful number, since it uses less digits than its factorization.

6556780223455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99460 (or 99453 counting only the distinct ones).

The product of its (nonzero) digits is 60480000, while the sum is 58.

The spelling of 6556780223455 in words is "six trillion, five hundred fifty-six billion, seven hundred eighty million, two hundred twenty-three thousand, four hundred fifty-five".