28533365631 has 12 divisors (see below), whose sum is σ = 41410195320. Its totient is φ = 18932089680.

The previous prime is 28533365629. The next prime is 28533365639. The reversal of 28533365631 is 13656333582.

28533365631 is a `hidden beast` number, since 2 + 8 + 5 + 3 + 3 + 3 + 6 + 5 + 631 = 666.

It is not a de Polignac number, because 28533365631 - 2¹ = 28533365629 is a prime.

It is a super-2 number, since 2×28533365631² (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 (28533365639) 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, 7510836 + ... + 7514633.

It is an arithmetic number, because the mean of its divisors is an integer number (3450849610).

Almost surely, 2^28533365631 is an apocalyptic number.

28533365631 is a deficient number, since it is larger than the sum of its proper divisors (12876829689).

28533365631 is a wasteful number, since it uses less digits than its factorization.

28533365631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15025686 (or 15025683 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 28533365631 in words is "twenty-eight billion, five hundred thirty-three million, three hundred sixty-five thousand, six hundred thirty-one".