28151869859999 has 4 divisors (see below), whose sum is σ = 28177254775320. Its totient is φ = 28126484944680.

The previous prime is 28151869859989. The next prime is 28151869860041. The reversal of 28151869859999 is 99995896815182.

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

It is a cyclic number.

It is not a de Polignac number, because 28151869859999 - 2¹⁶ = 28151869794463 is a prime.

It is a super-2 number, since 2×28151869859999² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28151869859959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12692455997 + ... + 12692458214.

It is an arithmetic number, because the mean of its divisors is an integer number (7044313693830).

Almost surely, 2^{28151869859999} is an apocalyptic number.

28151869859999 is a deficient number, since it is larger than the sum of its proper divisors (25384915321).

28151869859999 is a wasteful number, since it uses less digits than its factorization.

28151869859999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25384915320.

The product of its digits is 9069926400, while the sum is 89.

The spelling of 28151869859999 in words is "twenty-eight trillion, one hundred fifty-one billion, eight hundred sixty-nine million, eight hundred fifty-nine thousand, nine hundred ninety-nine".