71535071710781 has 12 divisors (see below), whose sum is σ = 83214641170080. Its totient is φ = 61315500115800.

The previous prime is 71535071710777. The next prime is 71535071710783. The reversal of 71535071710781 is 18701717053517.

It is not a de Polignac number, because 71535071710781 - 2² = 71535071710777 is a prime.

It is a super-2 number, since 2×71535071710781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71535071710783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8130890 + ... + 14463108.

It is an arithmetic number, because the mean of its divisors is an integer number (6934553430840).

Almost surely, 2^{71535071710781} is an apocalyptic number.

It is an amenable number.

71535071710781 is a deficient number, since it is larger than the sum of its proper divisors (11679569459299).

71535071710781 is a wasteful number, since it uses less digits than its factorization.

71535071710781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6562784 (or 6562777 counting only the distinct ones).

The product of its (nonzero) digits is 1440600, while the sum is 53.

The spelling of 71535071710781 in words is "seventy-one trillion, five hundred thirty-five billion, seventy-one million, seven hundred ten thousand, seven hundred eighty-one".