71681036142 has 16 divisors (see below), whose sum is σ = 144456440832. Its totient is φ = 23711283960.

The previous prime is 71681036131. The next prime is 71681036171. The reversal of 71681036142 is 24163018617.

It is a self number, because there is not a number n which added to its sum of digits gives 71681036142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45597838 + ... + 45599409.

It is an arithmetic number, because the mean of its divisors is an integer number (9028527552).

Almost surely, 2^71681036142 is an apocalyptic number.

71681036142 is an abundant number, since it is smaller than the sum of its proper divisors (72775404690).

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

71681036142 is a wasteful number, since it uses less digits than its factorization.

71681036142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91197383.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 71681036142 in words is "seventy-one billion, six hundred eighty-one million, thirty-six thousand, one hundred forty-two".