406632256666463 has 32 divisors (see below), whose sum is σ = 413264994667200. Its totient is φ = 400071438176256.

The previous prime is 406632256666387. The next prime is 406632256666477. The reversal of 406632256666463 is 364666652236604.

It is a cyclic number.

It is not a de Polignac number, because 406632256666463 - 2²⁴ = 406632239889247 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406632256666463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406632252666463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9642898043 + ... + 9642940211.

It is an arithmetic number, because the mean of its divisors is an integer number (12914531083350).

Almost surely, 2^{406632256666463} is an apocalyptic number.

406632256666463 is a deficient number, since it is larger than the sum of its proper divisors (6632738000737).

406632256666463 is a wasteful number, since it uses less digits than its factorization.

406632256666463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43931.

The product of its (nonzero) digits is 806215680, while the sum is 65.

The spelling of 406632256666463 in words is "four hundred six trillion, six hundred thirty-two billion, two hundred fifty-six million, six hundred sixty-six thousand, four hundred sixty-three".