438357798761 has 2 divisors, whose sum is σ = 438357798762. Its totient is φ = 438357798760.

The previous prime is 438357798737. The next prime is 438357798811. The reversal of 438357798761 is 167897753834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314967888400 + 123389910361 = 561220^2 + 351269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438357798761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438357798691 and 438357798700.

It is not a weakly prime, because it can be changed into another prime (438357795761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219178899380 + 219178899381.

It is an arithmetic number, because the mean of its divisors is an integer number (219178899381).

Almost surely, 2^438357798761 is an apocalyptic number.

It is an amenable number.

438357798761 is a deficient number, since it is larger than the sum of its proper divisors (1).

438357798761 is an equidigital number, since it uses as much as digits as its factorization.

438357798761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 213373440, while the sum is 68.

The spelling of 438357798761 in words is "four hundred thirty-eight billion, three hundred fifty-seven million, seven hundred ninety-eight thousand, seven hundred sixty-one".