71387774771 has 2 divisors, whose sum is σ = 71387774772. Its totient is φ = 71387774770.

The previous prime is 71387774761. The next prime is 71387774789. The reversal of 71387774771 is 17747778317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71387774771 - 2³⁰ = 70314032947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71387774771.

It is not a weakly prime, because it can be changed into another prime (71387774741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35693887385 + 35693887386.

It is an arithmetic number, because the mean of its divisors is an integer number (35693887386).

Almost surely, 2^71387774771 is an apocalyptic number.

71387774771 is a deficient number, since it is larger than the sum of its proper divisors (1).

71387774771 is an equidigital number, since it uses as much as digits as its factorization.

71387774771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11294304, while the sum is 59.

The spelling of 71387774771 in words is "seventy-one billion, three hundred eighty-seven million, seven hundred seventy-four thousand, seven hundred seventy-one".