28531268451 has 12 divisors (see below), whose sum is σ = 47099236912. Its totient is φ = 16303581936.

The previous prime is 28531268429. The next prime is 28531268489. The reversal of 28531268451 is 15486213582.

28531268451 is a `hidden beast` number, since 2 + 8 + 531 + 2 + 68 + 4 + 51 = 666.

It is not a de Polignac number, because 28531268451 - 2⁶ = 28531268387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28531268397 and 28531268406.

It is not an unprimeable number, because it can be changed into a prime (28531268401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226438576 + ... + 226438701.

Almost surely, 2^28531268451 is an apocalyptic number.

28531268451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28531268451 is a deficient number, since it is larger than the sum of its proper divisors (18567968461).

28531268451 is a wasteful number, since it uses less digits than its factorization.

28531268451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452877290 (or 452877287 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The spelling of 28531268451 in words is "twenty-eight billion, five hundred thirty-one million, two hundred sixty-eight thousand, four hundred fifty-one".