78673748417 has 16 divisors (see below), whose sum is σ = 88583328000. Its totient is φ = 69259927440.

The previous prime is 78673748399. The next prime is 78673748423. The reversal of 78673748417 is 71484737687.

It is not a de Polignac number, because 78673748417 - 2⁶ = 78673748353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78673748417.

It is not an unprimeable number, because it can be changed into a prime (78673748117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861167 + ... + 948132.

It is an arithmetic number, because the mean of its divisors is an integer number (5536458000).

Almost surely, 2^78673748417 is an apocalyptic number.

It is an amenable number.

78673748417 is a deficient number, since it is larger than the sum of its proper divisors (9909579583).

78673748417 is a wasteful number, since it uses less digits than its factorization.

78673748417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809436.

The product of its digits is 44255232, while the sum is 62.

The spelling of 78673748417 in words is "seventy-eight billion, six hundred seventy-three million, seven hundred forty-eight thousand, four hundred seventeen".