8478004477172 has 24 divisors (see below), whose sum is σ = 15709342379976. Its totient is φ = 3989624076288.

The previous prime is 8478004477099. The next prime is 8478004477213. The reversal of 8478004477172 is 2717744008748.

It can be written as a sum of positive squares in 4 ways, for example, as 4597876678756 + 3880127798416 = 2144266^2 + 1969804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14795318 + ... + 15357650.

It is an arithmetic number, because the mean of its divisors is an integer number (654555932499).

Almost surely, 2^{8478004477172} is an apocalyptic number.

It is an amenable number.

8478004477172 is a deficient number, since it is larger than the sum of its proper divisors (7231337902804).

8478004477172 is a wasteful number, since it uses less digits than its factorization.

8478004477172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784067 (or 784065 counting only the distinct ones).

The product of its (nonzero) digits is 19668992, while the sum is 59.

The spelling of 8478004477172 in words is "eight trillion, four hundred seventy-eight billion, four million, four hundred seventy-seven thousand, one hundred seventy-two".