100909551005 has 4 divisors (see below), whose sum is σ = 121091461212. Its totient is φ = 80727640800.

The previous prime is 100909550993. The next prime is 100909551013. The reversal of 100909551005 is 500155909001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58752427321 + 42157123684 = 242389^2 + 205322^2 .

It is not a de Polignac number, because 100909551005 - 2¹² = 100909546909 is a prime.

It is a Duffinian number.

It is a congruent 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, 10090955096 + ... + 10090955105.

It is an arithmetic number, because the mean of its divisors is an integer number (30272865303).

Almost surely, 2^100909551005 is an apocalyptic number.

It is an amenable number.

100909551005 is a deficient number, since it is larger than the sum of its proper divisors (20181910207).

100909551005 is an equidigital number, since it uses as much as digits as its factorization.

100909551005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20181910206.

The product of its (nonzero) digits is 10125, while the sum is 35.

The spelling of 100909551005 in words is "one hundred billion, nine hundred nine million, five hundred fifty-one thousand, five".