12789100005 has 32 divisors (see below), whose sum is σ = 22415488128. Its totient is φ = 6175027200.

The previous prime is 12789099989. The next prime is 12789100007. The reversal of 12789100005 is 50000198721.

It is not a de Polignac number, because 12789100005 - 2⁴ = 12789099989 is a prime.

It is a super-2 number, since 2×12789100005² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12789100007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121044 + ... + 200573.

It is an arithmetic number, because the mean of its divisors is an integer number (700484004).

Almost surely, 2^12789100005 is an apocalyptic number.

12789100005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12789100005 is a deficient number, since it is larger than the sum of its proper divisors (9626388123).

12789100005 is a wasteful number, since it uses less digits than its factorization.

12789100005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321877.

The product of its (nonzero) digits is 5040, while the sum is 33.

Adding to 12789100005 its reverse (50000198721), we get a palindrome (62789298726).

The spelling of 12789100005 in words is "twelve billion, seven hundred eighty-nine million, one hundred thousand, five".