71678433647 has 8 divisors (see below), whose sum is σ = 73995197952. Its totient is φ = 69361954200.

The previous prime is 71678433643. The next prime is 71678433653. The reversal of 71678433647 is 74633487617.

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

It is a cyclic number.

It is not a de Polignac number, because 71678433647 - 2² = 71678433643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71678433592 and 71678433601.

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, 517568 + ... + 641274.

It is an arithmetic number, because the mean of its divisors is an integer number (9249399744).

Almost surely, 2^71678433647 is an apocalyptic number.

71678433647 is a deficient number, since it is larger than the sum of its proper divisors (2316764305).

71678433647 is a wasteful number, since it uses less digits than its factorization.

71678433647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142429.

The product of its digits is 14224896, while the sum is 56.

The spelling of 71678433647 in words is "seventy-one billion, six hundred seventy-eight million, four hundred thirty-three thousand, six hundred forty-seven".