565139128 has 8 divisors (see below), whose sum is σ = 1059635880. Its totient is φ = 282569560.

The previous prime is 565139117. The next prime is 565139149. The reversal of 565139128 is 821931565.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35321188 + ... + 35321203.

It is an arithmetic number, because the mean of its divisors is an integer number (132454485).

Almost surely, 2^565139128 is an apocalyptic number.

It is an amenable number.

565139128 is a deficient number, since it is larger than the sum of its proper divisors (494496752).

565139128 is a wasteful number, since it uses less digits than its factorization.

565139128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70642397 (or 70642393 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 565139128 is about 23772.6550473438. The cubic root of 565139128 is about 826.7707923239.

The spelling of 565139128 in words is "five hundred sixty-five million, one hundred thirty-nine thousand, one hundred twenty-eight".