406684431659 has 8 divisors (see below), whose sum is σ = 469753140528. Its totient is φ = 347965288960.

The previous prime is 406684431641. The next prime is 406684431661. The reversal of 406684431659 is 956134486604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406684431659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406684439659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087391342 + ... + 1087391715.

It is an arithmetic number, because the mean of its divisors is an integer number (58719142566).

Almost surely, 2^406684431659 is an apocalyptic number.

406684431659 is a deficient number, since it is larger than the sum of its proper divisors (63068708869).

406684431659 is a wasteful number, since it uses less digits than its factorization.

406684431659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174783085.

The product of its (nonzero) digits is 14929920, while the sum is 56.

Subtracting 406684431659 from its reverse (956134486604), we obtain a palindrome (549450054945).

The spelling of 406684431659 in words is "four hundred six billion, six hundred eighty-four million, four hundred thirty-one thousand, six hundred fifty-nine".