646230266405 has 8 divisors (see below), whose sum is σ = 775482708600. Its totient is φ = 516979953856.

The previous prime is 646230266401. The next prime is 646230266443. The reversal of 646230266405 is 504662032646.

It can be written as a sum of positive squares in 4 ways, for example, as 351448594561 + 294781671844 = 592831^2 + 542938^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646230266405 - 2² = 646230266401 is a prime.

It is a super-2 number, since 2×646230266405² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646230266401) 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 in 7 ways as a sum of consecutive naturals, for example, 235991 + ... + 1161099.

It is an arithmetic number, because the mean of its divisors is an integer number (96935338575).

Almost surely, 2^646230266405 is an apocalyptic number.

It is an amenable number.

646230266405 is a deficient number, since it is larger than the sum of its proper divisors (129252442195).

646230266405 is a wasteful number, since it uses less digits than its factorization.

646230266405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064823.

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 646230266405 in words is "six hundred forty-six billion, two hundred thirty million, two hundred sixty-six thousand, four hundred five".