78471384815466 has 40 divisors (see below), whose sum is σ = 175835075189664. Its totient is φ = 26156972631240.

The previous prime is 78471384815459. The next prime is 78471384815477. The reversal of 78471384815466 is 66451848317487.

It is a happy number.

78471384815466 is a `hidden beast` number, since 7 + 8 + 4 + 7 + 1 + 3 + 84 + 81 + 5 + 466 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 78471384815394 and 78471384815403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27679371 + ... + 30382401.

Almost surely, 2^{78471384815466} is an apocalyptic number.

78471384815466 is an abundant number, since it is smaller than the sum of its proper divisors (97363690374198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78471384815466 is a wasteful number, since it uses less digits than its factorization.

78471384815466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882248 (or 2882239 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 72.

The spelling of 78471384815466 in words is "seventy-eight trillion, four hundred seventy-one billion, three hundred eighty-four million, eight hundred fifteen thousand, four hundred sixty-six".