70704405409 has 27 divisors (see below), whose sum is σ = 81319672497. Its totient is φ = 61423593000.

The previous prime is 70704405377. The next prime is 70704405419. The reversal of 70704405409 is 90450440707.

The square root of 70704405409 is 265903.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 70704405409 - 2⁵ = 70704405377 is a prime.

It is a super-2 number, since 2×70704405409² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70704405419) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 67272934 + ... + 67273984.

Almost surely, 2^70704405409 is an apocalyptic number.

70704405409 is the 265903-rd square number.

70704405409 is the 132952-nd centered octagonal number.

It is an amenable number.

70704405409 is a deficient number, since it is larger than the sum of its proper divisors (10615267088).

70704405409 is an equidigital number, since it uses as much as digits as its factorization.

70704405409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 70704405409 in words is "seventy billion, seven hundred four million, four hundred five thousand, four hundred nine".