616679816 has 8 divisors (see below), whose sum is σ = 1156274670. Its totient is φ = 308339904.

The previous prime is 616679747. The next prime is 616679831. The reversal of 616679816 is 618976616.

It can be written as a sum of positive squares in only one way, i.e., 531486916 + 85192900 = 23054^2 + 9230^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38542481 + ... + 38542496.

Almost surely, 2^616679816 is an apocalyptic number.

It is an amenable number.

616679816 is a deficient number, since it is larger than the sum of its proper divisors (539594854).

616679816 is a wasteful number, since it uses less digits than its factorization.

616679816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77084983 (or 77084979 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 616679816 is about 24833.0387991482. The cubic root of 616679816 is about 851.1770617806.

The spelling of 616679816 in words is "six hundred sixteen million, six hundred seventy-nine thousand, eight hundred sixteen".