71933609540 has 72 divisors (see below), whose sum is σ = 163667282688. Its totient is φ = 26545034880.

The previous prime is 71933609537. The next prime is 71933609581. The reversal of 71933609540 is 4590633917.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7238375 + ... + 7248305.

It is an arithmetic number, because the mean of its divisors is an integer number (2273156704).

Almost surely, 2^71933609540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71933609540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81833641344).

71933609540 is an abundant number, since it is smaller than the sum of its proper divisors (91733673148).

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

71933609540 is a wasteful number, since it uses less digits than its factorization.

71933609540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12109 (or 12094 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 71933609540 in words is "seventy-one billion, nine hundred thirty-three million, six hundred nine thousand, five hundred forty".