71345544997 has 2 divisors, whose sum is σ = 71345544998. Its totient is φ = 71345544996.

The previous prime is 71345544979. The next prime is 71345545013. The reversal of 71345544997 is 79944554317.

It is a happy number.

Together with previous prime (71345544979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61028267521 + 10317277476 = 247039^2 + 101574^2 .

It is a cyclic number.

It is not a de Polignac number, because 71345544997 - 2²⁷ = 71211327269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71345544197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35672772498 + 35672772499.

It is an arithmetic number, because the mean of its divisors is an integer number (35672772499).

Almost surely, 2^71345544997 is an apocalyptic number.

It is an amenable number.

71345544997 is a deficient number, since it is larger than the sum of its proper divisors (1).

71345544997 is an equidigital number, since it uses as much as digits as its factorization.

71345544997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19051200, while the sum is 58.

The spelling of 71345544997 in words is "seventy-one billion, three hundred forty-five million, five hundred forty-four thousand, nine hundred ninety-seven".