815438480201 has 2 divisors, whose sum is σ = 815438480202. Its totient is φ = 815438480200.

The previous prime is 815438480137. The next prime is 815438480209. The reversal of 815438480201 is 102084834518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478282896400 + 337155583801 = 691580^2 + 580651^2 .

It is a cyclic number.

It is not a de Polignac number, because 815438480201 - 2⁶ = 815438480137 is a prime.

It is not a weakly prime, because it can be changed into another prime (815438480209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407719240100 + 407719240101.

It is an arithmetic number, because the mean of its divisors is an integer number (407719240101).

Almost surely, 2^815438480201 is an apocalyptic number.

It is an amenable number.

815438480201 is a deficient number, since it is larger than the sum of its proper divisors (1).

815438480201 is an equidigital number, since it uses as much as digits as its factorization.

815438480201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 815438480201 in words is "eight hundred fifteen billion, four hundred thirty-eight million, four hundred eighty thousand, two hundred one".