71745675646 has 8 divisors (see below), whose sum is σ = 112297579344. Its totient is φ = 34313149200.

The previous prime is 71745675641. The next prime is 71745675707. The reversal of 71745675646 is 64657654717.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71745675641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779844255 + ... + 779844346.

It is an arithmetic number, because the mean of its divisors is an integer number (14037197418).

Almost surely, 2^71745675646 is an apocalyptic number.

71745675646 is a deficient number, since it is larger than the sum of its proper divisors (40551903698).

71745675646 is a wasteful number, since it uses less digits than its factorization.

71745675646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559688626.

The product of its digits is 29635200, while the sum is 58.

The spelling of 71745675646 in words is "seventy-one billion, seven hundred forty-five million, six hundred seventy-five thousand, six hundred forty-six".