71344440691 has 2 divisors, whose sum is σ = 71344440692. Its totient is φ = 71344440690.

The previous prime is 71344440649. The next prime is 71344440709. The reversal of 71344440691 is 19604444317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71344440691 - 2¹³ = 71344432499 is a prime.

It is not a weakly prime, because it can be changed into another prime (71344441691) 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 as a sum of consecutive naturals, namely, 35672220345 + 35672220346.

It is an arithmetic number, because the mean of its divisors is an integer number (35672220346).

Almost surely, 2^71344440691 is an apocalyptic number.

71344440691 is a deficient number, since it is larger than the sum of its proper divisors (1).

71344440691 is an equidigital number, since it uses as much as digits as its factorization.

71344440691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 71344440691 in words is "seventy-one billion, three hundred forty-four million, four hundred forty thousand, six hundred ninety-one".