71416543440 has 80 divisors (see below), whose sum is σ = 241517774016. Its totient is φ = 17313100800.

The previous prime is 71416543423. The next prime is 71416543447. The reversal of 71416543440 is 4434561417.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71416543447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13523221 + ... + 13528500.

Almost surely, 2^71416543440 is an apocalyptic number.

It is an amenable number.

71416543440 is an abundant number, since it is smaller than the sum of its proper divisors (170101230576).

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

71416543440 is a wasteful number, since it uses less digits than its factorization.

71416543440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27051748 (or 27051742 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 71416543440 in words is "seventy-one billion, four hundred sixteen million, five hundred forty-three thousand, four hundred forty".