71273843388 has 216 divisors, whose sum is σ = 207156497184. Its totient is φ = 20607713280.

The previous prime is 71273843287. The next prime is 71273843393. The reversal of 71273843388 is 88334837217.

It is a happy number.

71273843388 is a `hidden beast` number, since 7 + 127 + 3 + 8 + 433 + 88 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 61815420 + ... + 61816572.

Almost surely, 2^71273843388 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 71273843388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103578248592).

71273843388 is an abundant number, since it is smaller than the sum of its proper divisors (135882653796).

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

71273843388 is a wasteful number, since it uses less digits than its factorization.

71273843388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1809 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 71273843388 in words is "seventy-one billion, two hundred seventy-three million, eight hundred forty-three thousand, three hundred eighty-eight".