71031124720 has 20 divisors (see below), whose sum is σ = 165147365160. Its totient is φ = 28412449856.

The previous prime is 71031124711. The next prime is 71031124739. The reversal of 71031124720 is 2742113017.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443944450 + ... + 443944609.

It is an arithmetic number, because the mean of its divisors is an integer number (8257368258).

Almost surely, 2^71031124720 is an apocalyptic number.

It is an amenable number.

71031124720 is an abundant number, since it is smaller than the sum of its proper divisors (94116240440).

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

71031124720 is a wasteful number, since it uses less digits than its factorization.

71031124720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887889072 (or 887889066 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

Adding to 71031124720 its reverse (2742113017), we get a palindrome (73773237737).

The spelling of 71031124720 in words is "seventy-one billion, thirty-one million, one hundred twenty-four thousand, seven hundred twenty".