505363641555 has 16 divisors (see below), whose sum is σ = 808672194720. Its totient is φ = 269497152768.

The previous prime is 505363641551. The next prime is 505363641571. The reversal of 505363641555 is 555146363505.

It is not a de Polignac number, because 505363641555 - 2² = 505363641551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505363641551) by changing a digit.

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, 1743652 + ... + 2012721.

It is an arithmetic number, because the mean of its divisors is an integer number (50542012170).

Almost surely, 2^505363641555 is an apocalyptic number.

505363641555 is a deficient number, since it is larger than the sum of its proper divisors (303308553165).

505363641555 is a wasteful number, since it uses less digits than its factorization.

505363641555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3765350.

The product of its (nonzero) digits is 4050000, while the sum is 48.

The spelling of 505363641555 in words is "five hundred five billion, three hundred sixty-three million, six hundred forty-one thousand, five hundred fifty-five".