1766320055655 has 32 divisors (see below), whose sum is σ = 2851303182336. Its totient is φ = 933641393664.

The previous prime is 1766320055653. The next prime is 1766320055663. The reversal of 1766320055655 is 5565500236671.

It is not a de Polignac number, because 1766320055655 - 2¹ = 1766320055653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1766320055598 and 1766320055607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1766320055653) 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, 43546314 + ... + 43586856.

It is an arithmetic number, because the mean of its divisors is an integer number (89103224448).

Almost surely, 2^{1766320055655} is an apocalyptic number.

1766320055655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1766320055655 is a deficient number, since it is larger than the sum of its proper divisors (1084983126681).

1766320055655 is a wasteful number, since it uses less digits than its factorization.

1766320055655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66367.

The product of its (nonzero) digits is 5670000, while the sum is 51.

The spelling of 1766320055655 in words is "one trillion, seven hundred sixty-six billion, three hundred twenty million, fifty-five thousand, six hundred fifty-five".