71545164720 has 160 divisors (see below), whose sum is σ = 228312387072. Its totient is φ = 18522986496.

The previous prime is 71545164637. The next prime is 71545164721. The reversal of 71545164720 is 2746154517.

It is not an unprimeable number, because it can be changed into a prime (71545164721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1702684 + ... + 1744196.

Almost surely, 2^71545164720 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 71545164720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114156193536).

71545164720 is an abundant number, since it is smaller than the sum of its proper divisors (156767222352).

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

71545164720 is a wasteful number, since it uses less digits than its factorization.

71545164720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41739 (or 41733 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 71545164720 in words is "seventy-one billion, five hundred forty-five million, one hundred sixty-four thousand, seven hundred twenty".