71245271720 has 64 divisors (see below), whose sum is σ = 183278937600. Its totient is φ = 24416709120.

The previous prime is 71245271711. The next prime is 71245271731. The reversal of 71245271720 is 2717254217.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631361 + ... + 735599.

It is an arithmetic number, because the mean of its divisors is an integer number (2863733400).

Almost surely, 2^71245271720 is an apocalyptic number.

71245271720 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71245271720 is an abundant number, since it is smaller than the sum of its proper divisors (112033665880).

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

71245271720 is a wasteful number, since it uses less digits than its factorization.

71245271720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106698 (or 106694 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 38.

The spelling of 71245271720 in words is "seventy-one billion, two hundred forty-five million, two hundred seventy-one thousand, seven hundred twenty".