28117669911 has 8 divisors (see below), whose sum is σ = 39695534064. Its totient is φ = 17642459520.

The previous prime is 28117669883. The next prime is 28117669913. The reversal of 28117669911 is 11996671182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28117669911 - 2¹¹ = 28117667863 is a prime.

It is a super-2 number, since 2×28117669911² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 551326861 = 28117669911 / (2 + 8 + 1 + 1 + 7 + 6 + 6 + 9 + 9 + 1 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28117669913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275663380 + ... + 275663481.

It is an arithmetic number, because the mean of its divisors is an integer number (4961941758).

Almost surely, 2^28117669911 is an apocalyptic number.

28117669911 is a deficient number, since it is larger than the sum of its proper divisors (11577864153).

28117669911 is a wasteful number, since it uses less digits than its factorization.

28117669911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551326881.

The product of its digits is 326592, while the sum is 51.

The spelling of 28117669911 in words is "twenty-eight billion, one hundred seventeen million, six hundred sixty-nine thousand, nine hundred eleven".