406402466251 has 4 divisors (see below), whose sum is σ = 407319853752. Its totient is φ = 405485078752.

The previous prime is 406402466207. The next prime is 406402466269. The reversal of 406402466251 is 152664204604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 406402466251 - 2⁹ = 406402465739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406402466851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458693086 + ... + 458693971.

It is an arithmetic number, because the mean of its divisors is an integer number (101829963438).

Almost surely, 2^406402466251 is an apocalyptic number.

406402466251 is a deficient number, since it is larger than the sum of its proper divisors (917387501).

406402466251 is an equidigital number, since it uses as much as digits as its factorization.

406402466251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917387500.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 406402466251 in words is "four hundred six billion, four hundred two million, four hundred sixty-six thousand, two hundred fifty-one".