28636818145 has 64 divisors (see below), whose sum is σ = 39983328000. Its totient is φ = 19508428800.

The previous prime is 28636818143. The next prime is 28636818169. The reversal of 28636818145 is 54181863682.

It is a happy number.

It is not a de Polignac number, because 28636818145 - 2¹ = 28636818143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28636818092 and 28636818101.

It is not an unprimeable number, because it can be changed into a prime (28636818143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23843545 + ... + 23844745.

It is an arithmetic number, because the mean of its divisors is an integer number (624739500).

Almost surely, 2^28636818145 is an apocalyptic number.

It is an amenable number.

28636818145 is a deficient number, since it is larger than the sum of its proper divisors (11346509855).

28636818145 is a wasteful number, since it uses less digits than its factorization.

28636818145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730.

The product of its digits is 2211840, while the sum is 52.

The spelling of 28636818145 in words is "twenty-eight billion, six hundred thirty-six million, eight hundred eighteen thousand, one hundred forty-five".