71285143540 has 48 divisors (see below), whose sum is σ = 169699057920. Its totient is φ = 24935368320.

The previous prime is 71285143481. The next prime is 71285143603. The reversal of 71285143540 is 4534158217.

It is a junction number, because it is equal to n+sod(n) for n = 71285143493 and 71285143502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7210156 + ... + 7220035.

It is an arithmetic number, because the mean of its divisors is an integer number (3535397040).

Almost surely, 2^71285143540 is an apocalyptic number.

It is an amenable number.

71285143540 is an abundant number, since it is smaller than the sum of its proper divisors (98413914380).

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

71285143540 is a wasteful number, since it uses less digits than its factorization.

71285143540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430232 (or 14430230 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 71285143540 in words is "seventy-one billion, two hundred eighty-five million, one hundred forty-three thousand, five hundred forty".