705618248609 has 2 divisors, whose sum is σ = 705618248610. Its totient is φ = 705618248608.

The previous prime is 705618248567. The next prime is 705618248717. The reversal of 705618248609 is 906842816507.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637008304384 + 68609944225 = 798128^2 + 261935^2 .

It is a cyclic number.

It is not a de Polignac number, because 705618248609 - 2²⁸ = 705349813153 is a prime.

It is a super-2 number, since 2×705618248609² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (705618248809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352809124304 + 352809124305.

It is an arithmetic number, because the mean of its divisors is an integer number (352809124305).

Almost surely, 2^705618248609 is an apocalyptic number.

It is an amenable number.

705618248609 is a deficient number, since it is larger than the sum of its proper divisors (1).

705618248609 is an equidigital number, since it uses as much as digits as its factorization.

705618248609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 705618248609 in words is "seven hundred five billion, six hundred eighteen million, two hundred forty-eight thousand, six hundred nine".