71302517680 has 20 divisors (see below), whose sum is σ = 165778353792. Its totient is φ = 28521007040.

The previous prime is 71302517639. The next prime is 71302517731. The reversal of 71302517680 is 8671520317.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 445640656 + ... + 445640815.

Almost surely, 2^71302517680 is an apocalyptic number.

It is an amenable number.

71302517680 is an abundant number, since it is smaller than the sum of its proper divisors (94475836112).

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

71302517680 is a wasteful number, since it uses less digits than its factorization.

71302517680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891281484 (or 891281478 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 71302517680 in words is "seventy-one billion, three hundred two million, five hundred seventeen thousand, six hundred eighty".