71287994868949 has 2 divisors, whose sum is σ = 71287994868950. Its totient is φ = 71287994868948.

The previous prime is 71287994868931. The next prime is 71287994868953. The reversal of 71287994868949 is 94986849978217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67770187030225 + 3517807838724 = 8232265^2 + 1875582^2 .

It is a cyclic number.

It is not a de Polignac number, because 71287994868949 - 2⁷ = 71287994868821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71287994868989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35643997434474 + 35643997434475.

It is an arithmetic number, because the mean of its divisors is an integer number (35643997434475).

Almost surely, 2^{71287994868949} is an apocalyptic number.

It is an amenable number.

71287994868949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71287994868949 is an equidigital number, since it uses as much as digits as its factorization.

71287994868949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31603654656, while the sum is 91.

The spelling of 71287994868949 in words is "seventy-one trillion, two hundred eighty-seven billion, nine hundred ninety-four million, eight hundred sixty-eight thousand, nine hundred forty-nine".