100509600505 has 4 divisors (see below), whose sum is σ = 120611520612. Its totient is φ = 80407680400.

The previous prime is 100509600437. The next prime is 100509600523. The reversal of 100509600505 is 505006905001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505006905001 = 6043 ⋅83568907.

It can be written as a sum of positive squares in 2 ways, for example, as 38678302224 + 61831298281 = 196668^2 + 248659^2 .

It is not a de Polignac number, because 100509600505 - 2¹⁷ = 100509469433 is a prime.

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, 10050960046 + ... + 10050960055.

It is an arithmetic number, because the mean of its divisors is an integer number (30152880153).

Almost surely, 2^100509600505 is an apocalyptic number.

It is an amenable number.

100509600505 is a deficient number, since it is larger than the sum of its proper divisors (20101920107).

100509600505 is an equidigital number, since it uses as much as digits as its factorization.

100509600505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20101920106.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 100509600505 in words is "one hundred billion, five hundred nine million, six hundred thousand, five hundred five".