28646158131 has 6 divisors (see below), whose sum is σ = 41377783980. Its totient is φ = 19097438748.

The previous prime is 28646158129. The next prime is 28646158139. The reversal of 28646158131 is 13185164682.

28646158131 is a `hidden beast` number, since 2 + 8 + 6 + 4 + 61 + 581 + 3 + 1 = 666.

It is not a de Polignac number, because 28646158131 - 2¹ = 28646158129 is a prime.

It is a super-2 number, since 2×28646158131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28646158139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1591453221 + ... + 1591453238.

It is an arithmetic number, because the mean of its divisors is an integer number (6896297330).

Almost surely, 2^28646158131 is an apocalyptic number.

28646158131 is a deficient number, since it is larger than the sum of its proper divisors (12731625849).

28646158131 is a wasteful number, since it uses less digits than its factorization.

28646158131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182906465 (or 3182906462 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 28646158131 in words is "twenty-eight billion, six hundred forty-six million, one hundred fifty-eight thousand, one hundred thirty-one".