12169961509899 has 16 divisors (see below), whose sum is σ = 16351428633120. Its totient is φ = 8051036847360.

The previous prime is 12169961509897. The next prime is 12169961509921. The reversal of 12169961509899 is 99890516996121.

It is not a de Polignac number, because 12169961509899 - 2¹ = 12169961509897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12169961509899.

It is not an unprimeable number, because it can be changed into a prime (12169961509897) 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 15 ways as a sum of consecutive naturals, for example, 16618284 + ... + 17335145.

It is an arithmetic number, because the mean of its divisors is an integer number (1021964289570).

Almost surely, 2^{12169961509899} is an apocalyptic number.

12169961509899 is a deficient number, since it is larger than the sum of its proper divisors (4181467123221).

12169961509899 is a wasteful number, since it uses less digits than its factorization.

12169961509899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33954350.

The product of its (nonzero) digits is 170061120, while the sum is 75.

The spelling of 12169961509899 in words is "twelve trillion, one hundred sixty-nine billion, nine hundred sixty-one million, five hundred nine thousand, eight hundred ninety-nine".