70256161 has 2 divisors, whose sum is σ = 70256162. Its totient is φ = 70256160.

The previous prime is 70256077. The next prime is 70256177. The reversal of 70256161 is 16165207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 16966161 = 7300^2 + 4119^2 .

It is an emirp because it is prime and its reverse (16165207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70256161 - 2⁹ = 70255649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70251161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35128080 + 35128081.

It is an arithmetic number, because the mean of its divisors is an integer number (35128081).

Almost surely, 2^70256161 is an apocalyptic number.

It is an amenable number.

70256161 is a deficient number, since it is larger than the sum of its proper divisors (1).

70256161 is an equidigital number, since it uses as much as digits as its factorization.

70256161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 70256161 is about 8381.8948335087. The cubic root of 70256161 is about 412.6306382676.

The spelling of 70256161 in words is "seventy million, two hundred fifty-six thousand, one hundred sixty-one".