71313955771 has 4 divisors (see below), whose sum is σ = 71401889944. Its totient is φ = 71226021600.

The previous prime is 71313955747. The next prime is 71313955787. The reversal of 71313955771 is 17755931317.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71313955771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71313955171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43965870 + ... + 43967491.

It is an arithmetic number, because the mean of its divisors is an integer number (17850472486).

Almost surely, 2^71313955771 is an apocalyptic number.

71313955771 is a deficient number, since it is larger than the sum of its proper divisors (87934173).

71313955771 is an equidigital number, since it uses as much as digits as its factorization.

71313955771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87934172.

The product of its digits is 694575, while the sum is 49.

The spelling of 71313955771 in words is "seventy-one billion, three hundred thirteen million, nine hundred fifty-five thousand, seven hundred seventy-one".