43681004217481 has 8 divisors (see below), whose sum is σ = 43790236807464. Its totient is φ = 43571773132800.

The previous prime is 43681004217439. The next prime is 43681004217581. The reversal of 43681004217481 is 18471240018634.

It can be written as a sum of positive squares in 4 ways, for example, as 7391030636025 + 36289973581456 = 2718645^2 + 6024116^2 .

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 43681004217481 - 2³⁷ = 43543565264009 is a prime.

It is a super-2 number, since 2×43681004217481² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43681004217421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78212281 + ... + 78768793.

It is an arithmetic number, because the mean of its divisors is an integer number (5473779600933).

Almost surely, 2^{43681004217481} is an apocalyptic number.

It is an amenable number.

43681004217481 is a deficient number, since it is larger than the sum of its proper divisors (109232589983).

43681004217481 is a wasteful number, since it uses less digits than its factorization.

43681004217481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752651.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 43681004217481 in words is "forty-three trillion, six hundred eighty-one billion, four million, two hundred seventeen thousand, four hundred eighty-one".