71920221840252 has 18 divisors (see below), whose sum is σ = 181798338540728. Its totient is φ = 23973407280072.

The previous prime is 71920221840239. The next prime is 71920221840263. The reversal of 71920221840252 is 25204812202917.

71920221840252 is a `hidden beast` number, since 7 + 1 + 9 + 20 + 2 + 218 + 402 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 71920221840198 and 71920221840207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 998891969968 + ... + 998891970039.

Almost surely, 2^{71920221840252} is an apocalyptic number.

It is an amenable number.

71920221840252 is an abundant number, since it is smaller than the sum of its proper divisors (109878116700476).

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

71920221840252 is a wasteful number, since it uses less digits than its factorization.

71920221840252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997783940017 (or 1997783940012 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 71920221840252 in words is "seventy-one trillion, nine hundred twenty billion, two hundred twenty-one million, eight hundred forty thousand, two hundred fifty-two".