47681478721447 has 8 divisors (see below), whose sum is σ = 47964297210480. Its totient is φ = 47398743025920.

The previous prime is 47681478721351. The next prime is 47681478721553. The reversal of 47681478721447 is 74412787418674.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47681478721447 - 2⁷ = 47681478721319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47681478727447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19542954 + ... + 21846967.

It is an arithmetic number, because the mean of its divisors is an integer number (5995537151310).

Almost surely, 2^{47681478721447} is an apocalyptic number.

47681478721447 is a deficient number, since it is larger than the sum of its proper divisors (282818489033).

47681478721447 is a wasteful number, since it uses less digits than its factorization.

47681478721447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41396753.

The product of its digits is 472055808, while the sum is 70.

The spelling of 47681478721447 in words is "forty-seven trillion, six hundred eighty-one billion, four hundred seventy-eight million, seven hundred twenty-one thousand, four hundred forty-seven".