78471388317487 has 8 divisors (see below), whose sum is σ = 86452726644432. Its totient is φ = 70631312616000.

The previous prime is 78471388317451. The next prime is 78471388317499.

78471388317487 is nontrivially palindromic in base 10.

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 78471388317487 - 2³¹ = 78469240833839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78471388317787) 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, 35315655198 + ... + 35315657419.

It is an arithmetic number, because the mean of its divisors is an integer number (10806590830554).

Almost surely, 2^{78471388317487} is an apocalyptic number.

78471388317487 is a deficient number, since it is larger than the sum of its proper divisors (7981338326945).

78471388317487 is a wasteful number, since it uses less digits than its factorization.

78471388317487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70631312729.

The product of its digits is 1416167424, while the sum is 76.

The spelling of 78471388317487 in words is "seventy-eight trillion, four hundred seventy-one billion, three hundred eighty-eight million, three hundred seventeen thousand, four hundred eighty-seven".