71678388787967 has 8 divisors (see below), whose sum is σ = 77198044931280. Its totient is φ = 66159580348800.

The previous prime is 71678388787727. The next prime is 71678388787987. The reversal of 71678388787967 is 76978788387617.

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 71678388787967 - 2⁸ = 71678388787711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71678388787987) 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, 211750409 + ... + 212088642.

It is an arithmetic number, because the mean of its divisors is an integer number (9649755616410).

Almost surely, 2^{71678388787967} is an apocalyptic number.

71678388787967 is a deficient number, since it is larger than the sum of its proper divisors (5519656143313).

71678388787967 is a wasteful number, since it uses less digits than its factorization.

71678388787967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423852073.

The product of its digits is 66913910784, while the sum is 92.

The spelling of 71678388787967 in words is "seventy-one trillion, six hundred seventy-eight billion, three hundred eighty-eight million, seven hundred eighty-seven thousand, nine hundred sixty-seven".