438100481549 has 2 divisors, whose sum is σ = 438100481550. Its totient is φ = 438100481548.

The previous prime is 438100481509. The next prime is 438100481551. The reversal of 438100481549 is 945184001834.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273301019524 + 164799462025 = 522782^2 + 405955^2 .

It is a cyclic number.

It is not a de Polignac number, because 438100481549 - 2²⁰ = 438099432973 is a prime.

Together with 438100481551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438100481509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219050240774 + 219050240775.

It is an arithmetic number, because the mean of its divisors is an integer number (219050240775).

Almost surely, 2^438100481549 is an apocalyptic number.

It is an amenable number.

438100481549 is a deficient number, since it is larger than the sum of its proper divisors (1).

438100481549 is an equidigital number, since it uses as much as digits as its factorization.

438100481549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 438100481549 in words is "four hundred thirty-eight billion, one hundred million, four hundred eighty-one thousand, five hundred forty-nine".