71774771012 has 48 divisors (see below), whose sum is σ = 147895012608. Its totient is φ = 29834697600.

The previous prime is 71774770981. The next prime is 71774771087. The reversal of 71774771012 is 21017747717.

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, 219137 + ... + 437687.

It is an arithmetic number, because the mean of its divisors is an integer number (3081146096).

Almost surely, 2^71774771012 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 71774771012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73947506304).

71774771012 is an abundant number, since it is smaller than the sum of its proper divisors (76120241596).

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

71774771012 is a wasteful number, since it uses less digits than its factorization.

71774771012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218916 (or 218914 counting only the distinct ones).

The product of its (nonzero) digits is 134456, while the sum is 44.

The spelling of 71774771012 in words is "seventy-one billion, seven hundred seventy-four million, seven hundred seventy-one thousand, twelve".