71673368540 has 36 divisors (see below), whose sum is σ = 154274759688. Its totient is φ = 27970081920.

The previous prime is 71673368539. The next prime is 71673368561. The reversal of 71673368540 is 4586337617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1032314 + ... + 1099553.

Almost surely, 2^71673368540 is an apocalyptic number.

It is an amenable number.

71673368540 is an abundant number, since it is smaller than the sum of its proper divisors (82601391148).

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

71673368540 is a wasteful number, since it uses less digits than its factorization.

71673368540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131958 (or 2131915 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 71673368540 in words is "seventy-one billion, six hundred seventy-three million, three hundred sixty-eight thousand, five hundred forty".