705640818505 has 32 divisors (see below), whose sum is σ = 983414750976. Its totient is φ = 476046768384.

The previous prime is 705640818479. The next prime is 705640818527. The reversal of 705640818505 is 505818046507.

It is a cyclic number.

It is not a de Polignac number, because 705640818505 - 2²³ = 705632429897 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1680187 + ... + 2057743.

It is an arithmetic number, because the mean of its divisors is an integer number (30731710968).

Almost surely, 2^705640818505 is an apocalyptic number.

It is an amenable number.

705640818505 is a deficient number, since it is larger than the sum of its proper divisors (277773932471).

705640818505 is a wasteful number, since it uses less digits than its factorization.

705640818505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378433.

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 705640818505 in words is "seven hundred five billion, six hundred forty million, eight hundred eighteen thousand, five hundred five".