71664277852412 has 12 divisors (see below), whose sum is σ = 143328555704880. Its totient is φ = 30713261936736.

The previous prime is 71664277852403. The next prime is 71664277852451. The reversal of 71664277852412 is 21425877246617.

71664277852412 is an admirable number.

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, 1279719247337 + ... + 1279719247392.

It is an arithmetic number, because the mean of its divisors is an integer number (11944046308740).

Almost surely, 2^{71664277852412} is an apocalyptic number.

It is an amenable number.

71664277852412 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71664277852412 is a wasteful number, since it uses less digits than its factorization.

71664277852412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559438494740 (or 2559438494738 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 62.

The spelling of 71664277852412 in words is "seventy-one trillion, six hundred sixty-four billion, two hundred seventy-seven million, eight hundred fifty-two thousand, four hundred twelve".