505405356242 has 16 divisors (see below), whose sum is σ = 769826941920. Its totient is φ = 248800335168.

The previous prime is 505405356227. The next prime is 505405356283. The reversal of 505405356242 is 242653504505.

It is a self number, because there is not a number n which added to its sum of digits gives 505405356242.

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 7 ways as a sum of consecutive naturals, for example, 733367 + ... + 1244442.

It is an arithmetic number, because the mean of its divisors is an integer number (48114183870).

Almost surely, 2^505405356242 is an apocalyptic number.

505405356242 is a deficient number, since it is larger than the sum of its proper divisors (264421585678).

505405356242 is a wasteful number, since it uses less digits than its factorization.

505405356242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979785.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 505405356242 in words is "five hundred five billion, four hundred five million, three hundred fifty-six thousand, two hundred forty-two".