70021671070217 has 4 divisors (see below), whose sum is σ = 70040923664196. Its totient is φ = 70002418476240.

The previous prime is 70021671070171. The next prime is 70021671070231. The reversal of 70021671070217 is 71207017612007.

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 38341557507136 + 31680113563081 = 6192056^2 + 5628509^2 .

It is a cyclic number.

It is not a de Polignac number, because 70021671070217 - 2¹⁰ = 70021671069193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70021671078217) 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, 9626291534 + ... + 9626298807.

It is an arithmetic number, because the mean of its divisors is an integer number (17510230916049).

Almost surely, 2^{70021671070217} is an apocalyptic number.

It is an amenable number.

70021671070217 is a deficient number, since it is larger than the sum of its proper divisors (19252593979).

70021671070217 is a wasteful number, since it uses less digits than its factorization.

70021671070217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19252593978.

The product of its (nonzero) digits is 57624, while the sum is 41.

The spelling of 70021671070217 in words is "seventy trillion, twenty-one billion, six hundred seventy-one million, seventy thousand, two hundred seventeen".