28618123513 has 12 divisors (see below), whose sum is σ = 35042601360. Its totient is φ = 23238776232.

The previous prime is 28618123483. The next prime is 28618123531. The reversal of 28618123513 is 31532181682.

It is not a de Polignac number, because 28618123513 - 2⁵ = 28618123481 is a prime.

It is a super-2 number, since 2×28618123513² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28618123213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15368631 + ... + 15370492.

It is an arithmetic number, because the mean of its divisors is an integer number (2920216780).

Almost surely, 2^28618123513 is an apocalyptic number.

It is an amenable number.

28618123513 is a deficient number, since it is larger than the sum of its proper divisors (6424477847).

28618123513 is a wasteful number, since it uses less digits than its factorization.

28618123513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30739156 (or 30739149 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The spelling of 28618123513 in words is "twenty-eight billion, six hundred eighteen million, one hundred twenty-three thousand, five hundred thirteen".