505555255528 has 8 divisors (see below), whose sum is σ = 947916104130. Its totient is φ = 252777627760.

The previous prime is 505555255489. The next prime is 505555255559. The reversal of 505555255528 is 825552555505.

It can be written as a sum of positive squares in only one way, i.e., 319019373124 + 186535882404 = 564818^2 + 431898^2 .

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

It is a super-2 number, since 2×505555255528² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31597203463 + ... + 31597203478.

Almost surely, 2^505555255528 is an apocalyptic number.

It is an amenable number.

505555255528 is a deficient number, since it is larger than the sum of its proper divisors (442360848602).

505555255528 is a wasteful number, since it uses less digits than its factorization.

505555255528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63194406947 (or 63194406943 counting only the distinct ones).

The product of its (nonzero) digits is 12500000, while the sum is 52.

The spelling of 505555255528 in words is "five hundred five billion, five hundred fifty-five million, two hundred fifty-five thousand, five hundred twenty-eight".