71353013861 has 2 divisors, whose sum is σ = 71353013862. Its totient is φ = 71353013860.

The previous prime is 71353013833. The next prime is 71353013867. The reversal of 71353013861 is 16831035317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66341789761 + 5011224100 = 257569^2 + 70790^2 .

It is a cyclic number.

It is not a de Polignac number, because 71353013861 - 2²² = 71348819557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71353013867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35676506930 + 35676506931.

It is an arithmetic number, because the mean of its divisors is an integer number (35676506931).

Almost surely, 2^71353013861 is an apocalyptic number.

It is an amenable number.

71353013861 is a deficient number, since it is larger than the sum of its proper divisors (1).

71353013861 is an equidigital number, since it uses as much as digits as its factorization.

71353013861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 71353013861 in words is "seventy-one billion, three hundred fifty-three million, thirteen thousand, eight hundred sixty-one".