100561005505 has 16 divisors (see below), whose sum is σ = 130743068544. Its totient is φ = 73955669760.

The previous prime is 100561005497. The next prime is 100561005511. The reversal of 100561005505 is 505500165001.

It is not a de Polignac number, because 100561005505 - 2³ = 100561005497 is a prime.

It is a super-2 number, since 2×100561005505² (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 15 ways as a sum of consecutive naturals, for example, 13752981 + ... + 13760290.

It is an arithmetic number, because the mean of its divisors is an integer number (8171441784).

Almost surely, 2^100561005505 is an apocalyptic number.

It is an amenable number.

100561005505 is a deficient number, since it is larger than the sum of its proper divisors (30182063039).

100561005505 is a wasteful number, since it uses less digits than its factorization.

100561005505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27513336.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 100561005505 in words is "one hundred billion, five hundred sixty-one million, five thousand, five hundred five".