78472338784671 has 64 divisors (see below), whose sum is σ = 113998499241984. Its totient is φ = 47728285516800.

The previous prime is 78472338784663. The next prime is 78472338784703. The reversal of 78472338784671 is 17648783327487.

It is not a de Polignac number, because 78472338784671 - 2³ = 78472338784663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78472338784593 and 78472338784602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78472338784171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4882237891 + ... + 4882253963.

It is an arithmetic number, because the mean of its divisors is an integer number (1781226550656).

Almost surely, 2^{78472338784671} is an apocalyptic number.

78472338784671 is a deficient number, since it is larger than the sum of its proper divisors (35526160457313).

78472338784671 is a wasteful number, since it uses less digits than its factorization.

78472338784671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20464.

The product of its digits is 2124251136, while the sum is 75.

The spelling of 78472338784671 in words is "seventy-eight trillion, four hundred seventy-two billion, three hundred thirty-eight million, seven hundred eighty-four thousand, six hundred seventy-one".