28417559899 has 4 divisors (see below), whose sum is σ = 28564801336. Its totient is φ = 28270318464.

The previous prime is 28417559867. The next prime is 28417559921. The reversal of 28417559899 is 99895571482.

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 28417559899 - 2⁵ = 28417559867 is a prime.

It is a super-2 number, since 2×28417559899² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28417559299) 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, 73620429 + ... + 73620814.

It is an arithmetic number, because the mean of its divisors is an integer number (7141200334).

Almost surely, 2^28417559899 is an apocalyptic number.

28417559899 is a deficient number, since it is larger than the sum of its proper divisors (147241437).

28417559899 is a wasteful number, since it uses less digits than its factorization.

28417559899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147241436.

The product of its digits is 65318400, while the sum is 67.

The spelling of 28417559899 in words is "twenty-eight billion, four hundred seventeen million, five hundred fifty-nine thousand, eight hundred ninety-nine".