71046428802649 has 2 divisors, whose sum is σ = 71046428802650. Its totient is φ = 71046428802648.

The previous prime is 71046428802617. The next prime is 71046428802731. The reversal of 71046428802649 is 94620882464017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40676332840000 + 30370095962649 = 6377800^2 + 5510907^2 .

It is a cyclic number.

It is not a de Polignac number, because 71046428802649 - 2⁵ = 71046428802617 is a prime.

It is not a weakly prime, because it can be changed into another prime (71046428809649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35523214401324 + 35523214401325.

It is an arithmetic number, because the mean of its divisors is an integer number (35523214401325).

Almost surely, 2^{71046428802649} is an apocalyptic number.

It is an amenable number.

71046428802649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71046428802649 is an equidigital number, since it uses as much as digits as its factorization.

71046428802649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 71046428802649 in words is "seventy-one trillion, forty-six billion, four hundred twenty-eight million, eight hundred two thousand, six hundred forty-nine".