71530478530872 has 32 divisors (see below), whose sum is σ = 180408729044880. Its totient is φ = 23632488481280.

The previous prime is 71530478530871. The next prime is 71530478530897. The reversal of 71530478530872 is 27803587403517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71530478530871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13187769879 + ... + 13187775302.

Almost surely, 2^{71530478530872} is an apocalyptic number.

It is an amenable number.

71530478530872 is an abundant number, since it is smaller than the sum of its proper divisors (108878250514008).

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

71530478530872 is a wasteful number, since it uses less digits than its factorization.

71530478530872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26375545303 (or 26375545299 counting only the distinct ones).

The product of its (nonzero) digits is 39513600, while the sum is 60.

The spelling of 71530478530872 in words is "seventy-one trillion, five hundred thirty billion, four hundred seventy-eight million, five hundred thirty thousand, eight hundred seventy-two".