438055528081 has 2 divisors, whose sum is σ = 438055528082. Its totient is φ = 438055528080.

The previous prime is 438055528051. The next prime is 438055528103. The reversal of 438055528081 is 180825550834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220727073856 + 217328454225 = 469816^2 + 466185^2 .

It is a cyclic number.

It is not a de Polignac number, because 438055528081 - 2²³ = 438047139473 is a prime.

It is a super-2 number, since 2×438055528081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (438055528051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219027764040 + 219027764041.

It is an arithmetic number, because the mean of its divisors is an integer number (219027764041).

Almost surely, 2^438055528081 is an apocalyptic number.

It is an amenable number.

438055528081 is a deficient number, since it is larger than the sum of its proper divisors (1).

438055528081 is an equidigital number, since it uses as much as digits as its factorization.

438055528081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536000, while the sum is 49.

The spelling of 438055528081 in words is "four hundred thirty-eight billion, fifty-five million, five hundred twenty-eight thousand, eighty-one".