5628512781 has 36 divisors (see below), whose sum is σ = 8589174048. Its totient is φ = 3545054832.

The previous prime is 5628512767. The next prime is 5628512783. The reversal of 5628512781 is 1872158265.

5628512781 is a `hidden beast` number, since 5 + 62 + 8 + 512 + 78 + 1 = 666.

It is not a de Polignac number, because 5628512781 - 2¹⁸ = 5628250637 is a prime.

It is a super-2 number, since 2×5628512781² = 63360312251760707922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5628512783) 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 35 ways as a sum of consecutive naturals, for example, 1424050 + ... + 1427996.

It is an arithmetic number, because the mean of its divisors is an integer number (238588168).

Almost surely, 2^5628512781 is an apocalyptic number.

It is an amenable number.

5628512781 is a deficient number, since it is larger than the sum of its proper divisors (2960661267).

5628512781 is a wasteful number, since it uses less digits than its factorization.

5628512781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142 (or 4056 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 5628512781 is about 75023.4148849544. The cubic root of 5628512781 is about 1778.8167851987.

The spelling of 5628512781 in words is "five billion, six hundred twenty-eight million, five hundred twelve thousand, seven hundred eighty-one".