505717081406 has 4 divisors (see below), whose sum is σ = 758575622112. Its totient is φ = 252858540702.

The previous prime is 505717081403. The next prime is 505717081427. The reversal of 505717081406 is 604180717505.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505717081403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126429270350 + ... + 126429270353.

It is an arithmetic number, because the mean of its divisors is an integer number (189643905528).

Almost surely, 2^505717081406 is an apocalyptic number.

505717081406 is a deficient number, since it is larger than the sum of its proper divisors (252858540706).

505717081406 is a wasteful number, since it uses less digits than its factorization.

505717081406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252858540705.

The product of its (nonzero) digits is 235200, while the sum is 44.

The spelling of 505717081406 in words is "five hundred five billion, seven hundred seventeen million, eighty-one thousand, four hundred six".