616573866538 has 32 divisors (see below), whose sum is σ = 1059860479104. Its totient is φ = 263527687872.

The previous prime is 616573866443. The next prime is 616573866563. The reversal of 616573866538 is 835668375616.

It is a super-2 number, since 2×616573866538² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 616573866538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8155720 + ... + 8230972.

It is an arithmetic number, because the mean of its divisors is an integer number (33120639972).

Almost surely, 2^616573866538 is an apocalyptic number.

616573866538 is a deficient number, since it is larger than the sum of its proper divisors (443286612566).

616573866538 is a wasteful number, since it uses less digits than its factorization.

616573866538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76846.

The product of its digits is 130636800, while the sum is 64.

The spelling of 616573866538 in words is "six hundred sixteen billion, five hundred seventy-three million, eight hundred sixty-six thousand, five hundred thirty-eight".