71678433646 has 8 divisors (see below), whose sum is σ = 107780531040. Its totient is φ = 35751589968.

The previous prime is 71678433643. The next prime is 71678433653. The reversal of 71678433646 is 64633487617.

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 (71678433643) 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 3 ways as a sum of consecutive naturals, for example, 43812406 + ... + 43814041.

It is an arithmetic number, because the mean of its divisors is an integer number (13472566380).

Almost surely, 2^71678433646 is an apocalyptic number.

71678433646 is a deficient number, since it is larger than the sum of its proper divisors (36102097394).

71678433646 is a wasteful number, since it uses less digits than its factorization.

71678433646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87626858.

The product of its digits is 12192768, while the sum is 55.

The spelling of 71678433646 in words is "seventy-one billion, six hundred seventy-eight million, four hundred thirty-three thousand, six hundred forty-six".