70861286722217 has 2 divisors, whose sum is σ = 70861286722218. Its totient is φ = 70861286722216.

The previous prime is 70861286722199. The next prime is 70861286722309. The reversal of 70861286722217 is 71222768216807.

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., 65002229260816 + 5859057461401 = 8062396^2 + 2420549^2 .

It is a cyclic number.

It is not a de Polignac number, because 70861286722217 - 2²⁰ = 70861285673641 is a prime.

It is not a weakly prime, because it can be changed into another prime (70861286722817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35430643361108 + 35430643361109.

It is an arithmetic number, because the mean of its divisors is an integer number (35430643361109).

Almost surely, 2^{70861286722217} is an apocalyptic number.

It is an amenable number.

70861286722217 is a deficient number, since it is larger than the sum of its proper divisors (1).

70861286722217 is an equidigital number, since it uses as much as digits as its factorization.

70861286722217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 70861286722217 in words is "seventy trillion, eight hundred sixty-one billion, two hundred eighty-six million, seven hundred twenty-two thousand, two hundred seventeen".