71012131785 has 192 divisors, whose sum is σ = 151226030592. Its totient is φ = 31290126336.

The previous prime is 71012131783. The next prime is 71012131789. The reversal of 71012131785 is 58713121017.

It is not a de Polignac number, because 71012131785 - 2¹ = 71012131783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71012131783) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 35558407 + ... + 35560403.

It is an arithmetic number, because the mean of its divisors is an integer number (787635576).

Almost surely, 2^71012131785 is an apocalyptic number.

It is an amenable number.

71012131785 is an abundant number, since it is smaller than the sum of its proper divisors (80213898807).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71012131785 is a wasteful number, since it uses less digits than its factorization.

71012131785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The spelling of 71012131785 in words is "seventy-one billion, twelve million, one hundred thirty-one thousand, seven hundred eighty-five".