438085240385081 has 4 divisors (see below), whose sum is σ = 444255455038464. Its totient is φ = 431915025731700.

The previous prime is 438085240385029. The next prime is 438085240385083. The reversal of 438085240385081 is 180583042580834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 438085240385081 - 2¹⁴ = 438085240368697 is a prime.

It is a super-2 number, since 2×438085240385081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438085240385081.

It is not an unprimeable number, because it can be changed into a prime (438085240385083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3085107326585 + ... + 3085107326726.

It is an arithmetic number, because the mean of its divisors is an integer number (111063863759616).

Almost surely, 2^{438085240385081} is an apocalyptic number.

It is an amenable number.

438085240385081 is a deficient number, since it is larger than the sum of its proper divisors (6170214653383).

438085240385081 is an equidigital number, since it uses as much as digits as its factorization.

438085240385081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6170214653382.

The product of its (nonzero) digits is 29491200, while the sum is 59.

The spelling of 438085240385081 in words is "four hundred thirty-eight trillion, eighty-five billion, two hundred forty million, three hundred eighty-five thousand, eighty-one".