78317860981 has 8 divisors (see below), whose sum is σ = 78998478464. Its totient is φ = 77639374800.

The previous prime is 78317860967. The next prime is 78317861029. The reversal of 78317860981 is 18906871387.

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 78317860981 - 2⁷ = 78317860853 is a prime.

It is a super-2 number, since 2×78317860981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78317864981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458970 + ... + 606043.

It is an arithmetic number, because the mean of its divisors is an integer number (9874809808).

Almost surely, 2^78317860981 is an apocalyptic number.

It is an amenable number.

78317860981 is a deficient number, since it is larger than the sum of its proper divisors (680617483).

78317860981 is a wasteful number, since it uses less digits than its factorization.

78317860981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065651.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 78317860981 in words is "seventy-eight billion, three hundred seventeen million, eight hundred sixty thousand, nine hundred eighty-one".