100555505515 has 4 divisors (see below), whose sum is σ = 120666606624. Its totient is φ = 80444404408.

The previous prime is 100555505417. The next prime is 100555505537. The reversal of 100555505515 is 515505555001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515505555001 = 769 ⋅670358329.

It is a cyclic number.

It is not a de Polignac number, because 100555505515 - 2¹³ = 100555497323 is a prime.

It is a super-2 number, since 2×100555505515² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10055550547 + ... + 10055550556.

It is an arithmetic number, because the mean of its divisors is an integer number (30166651656).

Almost surely, 2^100555505515 is an apocalyptic number.

100555505515 is a deficient number, since it is larger than the sum of its proper divisors (20111101109).

100555505515 is an equidigital number, since it uses as much as digits as its factorization.

100555505515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111101108.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 100555505515 in words is "one hundred billion, five hundred fifty-five million, five hundred five thousand, five hundred fifteen".