438132446849 has 2 divisors, whose sum is σ = 438132446850. Its totient is φ = 438132446848.

The previous prime is 438132446839. The next prime is 438132446903. The reversal of 438132446849 is 948644231834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297087133249 + 141045313600 = 545057^2 + 375560^2 .

It is a cyclic number.

It is not a de Polignac number, because 438132446849 - 2²⁴ = 438115669633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438132446794 and 438132446803.

It is not a weakly prime, because it can be changed into another prime (438132446839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219066223424 + 219066223425.

It is an arithmetic number, because the mean of its divisors is an integer number (219066223425).

Almost surely, 2^438132446849 is an apocalyptic number.

It is an amenable number.

438132446849 is a deficient number, since it is larger than the sum of its proper divisors (1).

438132446849 is an equidigital number, since it uses as much as digits as its factorization.

438132446849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15925248, while the sum is 56.

The spelling of 438132446849 in words is "four hundred thirty-eight billion, one hundred thirty-two million, four hundred forty-six thousand, eight hundred forty-nine".