28553532831 has 20 divisors (see below), whose sum is σ = 42673083552. Its totient is φ = 19027191168.

The previous prime is 28553532817. The next prime is 28553532863. The reversal of 28553532831 is 13823535582.

It is a happy number.

28553532831 is a `hidden beast` number, since 2 + 8 + 5 + 535 + 32 + 83 + 1 = 666.

It is not a de Polignac number, because 28553532831 - 2⁶ = 28553532767 is a prime.

It is a super-2 number, since 2×28553532831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28553532331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 106570 + ... + 261656.

Almost surely, 2^28553532831 is an apocalyptic number.

28553532831 is a deficient number, since it is larger than the sum of its proper divisors (14119550721).

28553532831 is a wasteful number, since it uses less digits than its factorization.

28553532831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157372 (or 157363 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 28553532831 in words is "twenty-eight billion, five hundred fifty-three million, five hundred thirty-two thousand, eight hundred thirty-one".