71084743640 has 32 divisors (see below), whose sum is σ = 160207740000. Its totient is φ = 28386418944.

The previous prime is 71084743637. The next prime is 71084743649. The reversal of 71084743640 is 4634748017.

It is a junction number, because it is equal to n+sod(n) for n = 71084743591 and 71084743600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71084743649) 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 in 7 ways as a sum of consecutive naturals, for example, 1459445 + ... + 1507364.

It is an arithmetic number, because the mean of its divisors is an integer number (5006491875).

Almost surely, 2^71084743640 is an apocalyptic number.

It is an amenable number.

71084743640 is an abundant number, since it is smaller than the sum of its proper divisors (89122996360).

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

71084743640 is a wasteful number, since it uses less digits than its factorization.

71084743640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967419 (or 2967415 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 71084743640 in words is "seventy-one billion, eighty-four million, seven hundred forty-three thousand, six hundred forty".