71963553673 has 8 divisors (see below), whose sum is σ = 79154503776. Its totient is φ = 65421411220.

The previous prime is 71963553659. The next prime is 71963553713. The reversal of 71963553673 is 37635536917.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-71963553673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71963553073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27032311 + ... + 27034972.

It is an arithmetic number, because the mean of its divisors is an integer number (9894312972).

Almost surely, 2^71963553673 is an apocalyptic number.

It is an amenable number.

71963553673 is a deficient number, since it is larger than the sum of its proper divisors (7190950103).

71963553673 is an equidigital number, since it uses as much as digits as its factorization.

71963553673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54067316 (or 54067294 counting only the distinct ones).

The product of its digits is 10716300, while the sum is 55.

The spelling of 71963553673 in words is "seventy-one billion, nine hundred sixty-three million, five hundred fifty-three thousand, six hundred seventy-three".