438513903874061 has 2 divisors, whose sum is σ = 438513903874062. Its totient is φ = 438513903874060.

The previous prime is 438513903874021. The next prime is 438513903874093. The reversal of 438513903874061 is 160478309315834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430558599008836 + 7955304865225 = 20749906^2 + 2820515^2 .

It is a cyclic number.

It is not a de Polignac number, because 438513903874061 - 2³⁴ = 438496724004877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 438513903873985 and 438513903874003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438513903874001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219256951937030 + 219256951937031.

It is an arithmetic number, because the mean of its divisors is an integer number (219256951937031).

Almost surely, 2^{438513903874061} is an apocalyptic number.

It is an amenable number.

438513903874061 is a deficient number, since it is larger than the sum of its proper divisors (1).

438513903874061 is an equidigital number, since it uses as much as digits as its factorization.

438513903874061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 438513903874061 in words is "four hundred thirty-eight trillion, five hundred thirteen billion, nine hundred three million, eight hundred seventy-four thousand, sixty-one".