71442988354985 has 24 divisors (see below), whose sum is σ = 92834378641944. Its totient is φ = 52757462784000.

The previous prime is 71442988354939. The next prime is 71442988355041. The reversal of 71442988354985 is 58945388924417.

It can be written as a sum of positive squares in 12 ways, for example, as 26112069340009 + 45330919014976 = 5109997^2 + 6732824^2 .

It is not a de Polignac number, because 71442988354985 - 2⁸ = 71442988354729 is a prime.

It is a super-3 number, since 3×71442988354985³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131126489 + ... + 131670201.

It is an arithmetic number, because the mean of its divisors is an integer number (3868099110081).

Almost surely, 2^{71442988354985} is an apocalyptic number.

It is an amenable number.

71442988354985 is a deficient number, since it is larger than the sum of its proper divisors (21391390286959).

71442988354985 is a wasteful number, since it uses less digits than its factorization.

71442988354985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699245 (or 699232 counting only the distinct ones).

The product of its digits is 2786918400, while the sum is 77.

The spelling of 71442988354985 in words is "seventy-one trillion, four hundred forty-two billion, nine hundred eighty-eight million, three hundred fifty-four thousand, nine hundred eighty-five".