71656233312 has 96 divisors (see below), whose sum is σ = 190681344000. Its totient is φ = 23557966848.

The previous prime is 71656233293. The next prime is 71656233347. The reversal of 71656233312 is 21333265617.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 7951113 + ... + 7960119.

It is an arithmetic number, because the mean of its divisors is an integer number (1986264000).

Almost surely, 2^71656233312 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 71656233312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95340672000).

71656233312 is an abundant number, since it is smaller than the sum of its proper divisors (119025110688).

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

71656233312 is a wasteful number, since it uses less digits than its factorization.

71656233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10148 (or 10140 counting only the distinct ones).

The product of its digits is 136080, while the sum is 39.

Adding to 71656233312 its reverse (21333265617), we get a palindrome (92989498929).

The spelling of 71656233312 in words is "seventy-one billion, six hundred fifty-six million, two hundred thirty-three thousand, three hundred twelve".