505605555510 has 48 divisors (see below), whose sum is σ = 1333795822128. Its totient is φ = 122571042880.

The previous prime is 505605555491. The next prime is 505605555571. The reversal of 505605555510 is 15555506505.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 69639009 + ... + 69646268.

It is an arithmetic number, because the mean of its divisors is an integer number (27787412961).

Almost surely, 2^505605555510 is an apocalyptic number.

505605555510 is an abundant number, since it is smaller than the sum of its proper divisors (828190266618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505605555510 is a wasteful number, since it uses less digits than its factorization.

505605555510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139285309 (or 139285298 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 505605555510 in words is "five hundred five billion, six hundred five million, five hundred fifty-five thousand, five hundred ten".