72109273543680 has 176 divisors, whose sum is σ = 238590006232320. Its totient is φ = 18566065717248.

The previous prime is 72109273543537. The next prime is 72109273543691. The reversal of 72109273543680 is 8634537290127.

It is a self number, because there is not a number n which added to its sum of digits gives 72109273543680.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80496184 + ... + 81387063.

It is a 1-persistent number, because it is pandigital, but 2⋅72109273543680 = 144218547087360 is not.

Almost surely, 2^{72109273543680} is an apocalyptic number.

It is an amenable number.

72109273543680 is an abundant number, since it is smaller than the sum of its proper divisors (166480732688640).

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

72109273543680 is a wasteful number, since it uses less digits than its factorization.

72109273543680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161883304 (or 161883286 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 72109273543680 in words is "seventy-two trillion, one hundred nine billion, two hundred seventy-three million, five hundred forty-three thousand, six hundred eighty".