70818391609 has 4 divisors (see below), whose sum is σ = 80935304704. Its totient is φ = 60701478516.

The previous prime is 70818391559. The next prime is 70818391673. The reversal of 70818391609 is 90619381807.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 70818391609 - 2¹¹ = 70818389561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70818391009) 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 3 ways as a sum of consecutive naturals, for example, 5058456537 + ... + 5058456550.

It is an arithmetic number, because the mean of its divisors is an integer number (20233826176).

Almost surely, 2^70818391609 is an apocalyptic number.

It is an amenable number.

70818391609 is a deficient number, since it is larger than the sum of its proper divisors (10116913095).

70818391609 is a wasteful number, since it uses less digits than its factorization.

70818391609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10116913094.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 70818391609 in words is "seventy billion, eight hundred eighteen million, three hundred ninety-one thousand, six hundred nine".