438400547802881 has 2 divisors, whose sum is σ = 438400547802882. Its totient is φ = 438400547802880.

The previous prime is 438400547802853. The next prime is 438400547802913. The reversal of 438400547802881 is 188208745004834.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233921730250000 + 204478817552881 = 15294500^2 + 14299609^2 .

It is a cyclic number.

It is not a de Polignac number, because 438400547802881 - 2¹⁴ = 438400547786497 is a prime.

It is a super-2 number, since 2×438400547802881² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438400547862881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219200273901440 + 219200273901441.

It is an arithmetic number, because the mean of its divisors is an integer number (219200273901441).

Almost surely, 2^{438400547802881} is an apocalyptic number.

It is an amenable number.

438400547802881 is a deficient number, since it is larger than the sum of its proper divisors (1).

438400547802881 is an equidigital number, since it uses as much as digits as its factorization.

438400547802881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55050240, while the sum is 62.

The spelling of 438400547802881 in words is "four hundred thirty-eight trillion, four hundred billion, five hundred forty-seven million, eight hundred two thousand, eight hundred eighty-one".