505555521616 has 10 divisors (see below), whose sum is σ = 979513823162. Its totient is φ = 252777760800.

The previous prime is 505555521589. The next prime is 505555521629. The reversal of 505555521616 is 616125555505.

It can be written as a sum of positive squares in only one way, i.e., 365425086016 + 140130435600 = 604504^2 + 374340^2 .

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, 15798610035 + ... + 15798610066.

Almost surely, 2^505555521616 is an apocalyptic number.

It is an amenable number.

505555521616 is a deficient number, since it is larger than the sum of its proper divisors (473958301546).

505555521616 is a wasteful number, since it uses less digits than its factorization.

505555521616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31597220109 (or 31597220103 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 46.

The spelling of 505555521616 in words is "five hundred five billion, five hundred fifty-five million, five hundred twenty-one thousand, six hundred sixteen".