401452578209 has 2 divisors, whose sum is σ = 401452578210. Its totient is φ = 401452578208.

The previous prime is 401452578193. The next prime is 401452578223. The reversal of 401452578209 is 902875254104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214350480400 + 187102097809 = 462980^2 + 432553^2 .

It is a cyclic number.

It is not a de Polignac number, because 401452578209 - 2⁴ = 401452578193 is a prime.

It is a super-2 number, since 2×401452578209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401452578409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200726289104 + 200726289105.

It is an arithmetic number, because the mean of its divisors is an integer number (200726289105).

Almost surely, 2^401452578209 is an apocalyptic number.

It is an amenable number.

401452578209 is a deficient number, since it is larger than the sum of its proper divisors (1).

401452578209 is an equidigital number, since it uses as much as digits as its factorization.

401452578209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 401452578209 in words is "four hundred one billion, four hundred fifty-two million, five hundred seventy-eight thousand, two hundred nine".