71678433648 has 40 divisors (see below), whose sum is σ = 185507872768. Its totient is φ = 23849122752.

The previous prime is 71678433643. The next prime is 71678433653. The reversal of 71678433648 is 84633487617.

It is an interprime number because it is at equal distance from previous prime (71678433643) and next prime (71678433653).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338736 + ... + 1391247.

Almost surely, 2^71678433648 is an apocalyptic number.

It is an amenable number.

71678433648 is an abundant number, since it is smaller than the sum of its proper divisors (113829439120).

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

71678433648 is a wasteful number, since it uses less digits than its factorization.

71678433648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730541 (or 2730535 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 57.

The spelling of 71678433648 in words is "seventy-one billion, six hundred seventy-eight million, four hundred thirty-three thousand, six hundred forty-eight".