70043685709 has 4 divisors (see below), whose sum is σ = 70430667580. Its totient is φ = 69656703840.

The previous prime is 70043685637. The next prime is 70043685713. The reversal of 70043685709 is 90758634007.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3491037225 + 66552648484 = 59085^2 + 257978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70043685709 is a prime.

It is a super-2 number, since 2×70043685709² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70043685749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193490664 + ... + 193491025.

It is an arithmetic number, because the mean of its divisors is an integer number (17607666895).

Almost surely, 2^70043685709 is an apocalyptic number.

It is an amenable number.

70043685709 is a deficient number, since it is larger than the sum of its proper divisors (386981871).

70043685709 is a wasteful number, since it uses less digits than its factorization.

70043685709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386981870.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 70043685709 in words is "seventy billion, forty-three million, six hundred eighty-five thousand, seven hundred nine".