43581401820813 has 8 divisors (see below), whose sum is σ = 58412768933376. Its totient is φ = 28902151294400.

The previous prime is 43581401820763. The next prime is 43581401820833. The reversal of 43581401820813 is 31802810418534.

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 43581401820813 - 2¹⁰ = 43581401819789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43581401820833) 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, 38029145868 + ... + 38029147013.

It is an arithmetic number, because the mean of its divisors is an integer number (7301596116672).

Almost surely, 2^{43581401820813} is an apocalyptic number.

It is an amenable number.

43581401820813 is a deficient number, since it is larger than the sum of its proper divisors (14831367112563).

43581401820813 is a wasteful number, since it uses less digits than its factorization.

43581401820813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76058293075.

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 43581401820813 in words is "forty-three trillion, five hundred eighty-one billion, four hundred one million, eight hundred twenty thousand, eight hundred thirteen".