555320666023555 has 4 divisors (see below), whose sum is σ = 666384799228272. Its totient is φ = 444256532818840.

The previous prime is 555320666023531. The next prime is 555320666023603.

555320666023555 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 555320666023555 - 2¹¹ = 555320666021507 is a prime.

It is a super-2 number, since 2×555320666023555² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 555320666023555.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55532066602351 + ... + 55532066602360.

It is an arithmetic number, because the mean of its divisors is an integer number (166596199807068).

Almost surely, 2^{555320666023555} is an apocalyptic number.

555320666023555 is a deficient number, since it is larger than the sum of its proper divisors (111064133204717).

555320666023555 is a wasteful number, since it uses less digits than its factorization.

555320666023555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111064133204716.

The product of its (nonzero) digits is 121500000, while the sum is 58.

The spelling of 555320666023555 in words is "five hundred fifty-five trillion, three hundred twenty billion, six hundred sixty-six million, twenty-three thousand, five hundred fifty-five".