400966455209 has 4 divisors (see below), whose sum is σ = 400969314816. Its totient is φ = 400963595604.

The previous prime is 400966455193. The next prime is 400966455221. The reversal of 400966455209 is 902554669004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400966455209 - 2⁴ = 400966455193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400966455229) 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, 1208009 + ... + 1503734.

It is an arithmetic number, because the mean of its divisors is an integer number (100242328704).

Almost surely, 2^400966455209 is an apocalyptic number.

It is an amenable number.

400966455209 is a deficient number, since it is larger than the sum of its proper divisors (2859607).

400966455209 is a wasteful number, since it uses less digits than its factorization.

400966455209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859606.

The product of its (nonzero) digits is 2332800, while the sum is 50.

The spelling of 400966455209 in words is "four hundred billion, nine hundred sixty-six million, four hundred fifty-five thousand, two hundred nine".