70205256491 has 2 divisors, whose sum is σ = 70205256492. Its totient is φ = 70205256490.

The previous prime is 70205256487. The next prime is 70205256497. The reversal of 70205256491 is 19465250207.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70205256491 - 2² = 70205256487 is a prime.

It is not a weakly prime, because it can be changed into another prime (70205256497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35102628245 + 35102628246.

It is an arithmetic number, because the mean of its divisors is an integer number (35102628246).

Almost surely, 2^70205256491 is an apocalyptic number.

70205256491 is a deficient number, since it is larger than the sum of its proper divisors (1).

70205256491 is an equidigital number, since it uses as much as digits as its factorization.

70205256491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 70205256491 in words is "seventy billion, two hundred five million, two hundred fifty-six thousand, four hundred ninety-one".