71739138140 has 24 divisors (see below), whose sum is σ = 150739698480. Its totient is φ = 28678987008.

The previous prime is 71739138137. The next prime is 71739138227. The reversal of 71739138140 is 4183193717.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71739138091 and 71739138100.

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, 1006445 + ... + 1075364.

It is an arithmetic number, because the mean of its divisors is an integer number (6280820770).

Almost surely, 2^71739138140 is an apocalyptic number.

It is an amenable number.

71739138140 is an abundant number, since it is smaller than the sum of its proper divisors (79000560340).

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

71739138140 is a wasteful number, since it uses less digits than its factorization.

71739138140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083541 (or 2083539 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 71739138140 in words is "seventy-one billion, seven hundred thirty-nine million, one hundred thirty-eight thousand, one hundred forty".