28199066511 has 32 divisors (see below), whose sum is σ = 47469772800. Its totient is φ = 14463427680.

The previous prime is 28199066503. The next prime is 28199066531. The reversal of 28199066511 is 11566099182.

It is not a de Polignac number, because 28199066511 - 2³ = 28199066503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28199066531) 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 31 ways as a sum of consecutive naturals, for example, 754371 + ... + 790868.

It is an arithmetic number, because the mean of its divisors is an integer number (1483430400).

Almost surely, 2^28199066511 is an apocalyptic number.

28199066511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28199066511 is a deficient number, since it is larger than the sum of its proper divisors (19270706289).

28199066511 is a wasteful number, since it uses less digits than its factorization.

28199066511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545339.

The product of its (nonzero) digits is 233280, while the sum is 48.

The spelling of 28199066511 in words is "twenty-eight billion, one hundred ninety-nine million, sixty-six thousand, five hundred eleven".