28169041915 has 16 divisors (see below), whose sum is σ = 38643311808. Its totient is φ = 19310173056.

The previous prime is 28169041913. The next prime is 28169041937. The reversal of 28169041915 is 51914096182.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28169041915 - 2¹ = 28169041913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28169041913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549 + ... + 237361.

It is an arithmetic number, because the mean of its divisors is an integer number (2415206988).

Almost surely, 2^28169041915 is an apocalyptic number.

28169041915 is a deficient number, since it is larger than the sum of its proper divisors (10474269893).

28169041915 is a wasteful number, since it uses less digits than its factorization.

28169041915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239238.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 28169041915 in words is "twenty-eight billion, one hundred sixty-nine million, forty-one thousand, nine hundred fifteen".