406586667649 has 4 divisors (see below), whose sum is σ = 406595816964. Its totient is φ = 406577518336.

The previous prime is 406586667637. The next prime is 406586667677. The reversal of 406586667649 is 946766685604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65437221249 + 341149446400 = 255807^2 + 584080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406586667649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406586667629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4507672 + ... + 4596985.

It is an arithmetic number, because the mean of its divisors is an integer number (101648954241).

Almost surely, 2^406586667649 is an apocalyptic number.

It is an amenable number.

406586667649 is a deficient number, since it is larger than the sum of its proper divisors (9149315).

406586667649 is an equidigital number, since it uses as much as digits as its factorization.

406586667649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149314.

The product of its (nonzero) digits is 313528320, while the sum is 67.

The spelling of 406586667649 in words is "four hundred six billion, five hundred eighty-six million, six hundred sixty-seven thousand, six hundred forty-nine".