505545554 has 4 divisors (see below), whose sum is σ = 758318334. Its totient is φ = 252772776.

The previous prime is 505545529. The next prime is 505545563. The reversal of 505545554 is 455545505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 325261225 + 180284329 = 18035^2 + 13427^2 .

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, 126386387 + ... + 126386390.

Almost surely, 2^505545554 is an apocalyptic number.

505545554 is a deficient number, since it is larger than the sum of its proper divisors (252772780).

505545554 is a wasteful number, since it uses less digits than its factorization.

505545554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252772779.

The product of its (nonzero) digits is 250000, while the sum is 38.

The square root of 505545554 is about 22484.3401949001. The cubic root of 505545554 is about 796.6240833978.

The spelling of 505545554 in words is "five hundred five million, five hundred forty-five thousand, five hundred fifty-four".