78846474484547 has 32 divisors (see below), whose sum is σ = 103855481579520. Its totient is φ = 58058098922880.

The previous prime is 78846474484511. The next prime is 78846474484639. The reversal of 78846474484547 is 74548447464887.

It is a happy number.

It is not a de Polignac number, because 78846474484547 - 2⁸ = 78846474484291 is a prime.

It is a super-2 number, since 2×78846474484547² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (80) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78846474484147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375529748 + ... + 375739649.

It is an arithmetic number, because the mean of its divisors is an integer number (3245483799360).

Almost surely, 2^{78846474484547} is an apocalyptic number.

78846474484547 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78846474484547 is a deficient number, since it is larger than the sum of its proper divisors (25009007094973).

78846474484547 is a wasteful number, since it uses less digits than its factorization.

78846474484547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751269491.

The product of its digits is 21579694080, while the sum is 80.

The spelling of 78846474484547 in words is "seventy-eight trillion, eight hundred forty-six billion, four hundred seventy-four million, four hundred eighty-four thousand, five hundred forty-seven".