28563065631 has 6 divisors (see below), whose sum is σ = 41257761480. Its totient is φ = 19042043748.

The previous prime is 28563065599. The next prime is 28563065653. The reversal of 28563065631 is 13656036582.

28563065631 is a `hidden beast` number, since 2 + 8 + 5 + 6 + 3 + 0 + 6 + 5 + 631 = 666.

It is not a de Polignac number, because 28563065631 - 2⁵ = 28563065599 is a prime.

It is a super-2 number, since 2×28563065631² (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 (28563063631) 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, 1586836971 + ... + 1586836988.

It is an arithmetic number, because the mean of its divisors is an integer number (6876293580).

Almost surely, 2^28563065631 is an apocalyptic number.

28563065631 is a deficient number, since it is larger than the sum of its proper divisors (12694695849).

28563065631 is a wasteful number, since it uses less digits than its factorization.

28563065631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173673965 (or 3173673962 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 28563065631 in words is "twenty-eight billion, five hundred sixty-three million, sixty-five thousand, six hundred thirty-one".