47181685665678 has 16 divisors (see below), whose sum is σ = 95336189593680. Its totient is φ = 15565092178176.

The previous prime is 47181685665649. The next prime is 47181685665767. The reversal of 47181685665678 is 87656658618174.

It is a super-2 number, since 2×47181685665678² (a number of 28 digits) contains 22 as substring.

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, 40534093633 + ... + 40534094796.

It is an arithmetic number, because the mean of its divisors is an integer number (5958511849605).

Almost surely, 2^{47181685665678} is an apocalyptic number.

47181685665678 is an abundant number, since it is smaller than the sum of its proper divisors (48154503928002).

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

47181685665678 is a wasteful number, since it uses less digits than its factorization.

47181685665678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81068188531.

The product of its digits is 3251404800, while the sum is 78.

The spelling of 47181685665678 in words is "forty-seven trillion, one hundred eighty-one billion, six hundred eighty-five million, six hundred sixty-five thousand, six hundred seventy-eight".