28101170513 has 16 divisors (see below), whose sum is σ = 30407993616. Its totient is φ = 25815317760.

The previous prime is 28101170509. The next prime is 28101170551. The reversal of 28101170513 is 31507110182.

It can be written as a sum of positive squares in 8 ways, for example, as 5603570449 + 22497600064 = 74857^2 + 149992^2 .

It is a cyclic number.

It is not a de Polignac number, because 28101170513 - 2² = 28101170509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28101176513) 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 15 ways as a sum of consecutive naturals, for example, 3384395 + ... + 3392687.

It is an arithmetic number, because the mean of its divisors is an integer number (1900499601).

Almost surely, 2^28101170513 is an apocalyptic number.

It is an amenable number.

28101170513 is a deficient number, since it is larger than the sum of its proper divisors (2306823103).

28101170513 is a wasteful number, since it uses less digits than its factorization.

28101170513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524.

The product of its (nonzero) digits is 1680, while the sum is 29.

Adding to 28101170513 its reverse (31507110182), we get a palindrome (59608280695).

The spelling of 28101170513 in words is "twenty-eight billion, one hundred one million, one hundred seventy thousand, five hundred thirteen".