12851189505 has 96 divisors (see below), whose sum is σ = 29233751040. Its totient is φ = 5059635840.

The previous prime is 12851189503. The next prime is 12851189509. The reversal of 12851189505 is 50598115821.

It is a happy number.

12851189505 is a `hidden beast` number, since 1 + 2 + 8 + 511 + 89 + 50 + 5 = 666.

It is not a de Polignac number, because 12851189505 - 2¹ = 12851189503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (12851189501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31767 + ... + 163436.

It is an arithmetic number, because the mean of its divisors is an integer number (304518240).

Almost surely, 2^12851189505 is an apocalyptic number.

12851189505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12851189505 is an abundant number, since it is smaller than the sum of its proper divisors (16382561535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12851189505 is a wasteful number, since it uses less digits than its factorization.

12851189505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195251 (or 195248 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 45.

The spelling of 12851189505 in words is "twelve billion, eight hundred fifty-one million, one hundred eighty-nine thousand, five hundred five".