100556105555 has 4 divisors (see below), whose sum is σ = 120667326672. Its totient is φ = 80444884440.

The previous prime is 100556105539. The next prime is 100556105579. The reversal of 100556105555 is 555501655001.

It is a happy number.

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

It is not a de Polignac number, because 100556105555 - 2⁴ = 100556105539 is a prime.

It is a super-2 number, since 2×100556105555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 10055610551 + ... + 10055610560.

It is an arithmetic number, because the mean of its divisors is an integer number (30166831668).

Almost surely, 2^100556105555 is an apocalyptic number.

100556105555 is a deficient number, since it is larger than the sum of its proper divisors (20111221117).

100556105555 is an equidigital number, since it uses as much as digits as its factorization.

100556105555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111221116.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 100556105555 in words is "one hundred billion, five hundred fifty-six million, one hundred five thousand, five hundred fifty-five".