400946409266 has 32 divisors (see below), whose sum is σ = 687724633008. Its totient is φ = 173673308160.

The previous prime is 400946409263. The next prime is 400946409293. The reversal of 400946409266 is 662904649004.

It can be written as a sum of positive squares in 8 ways, for example, as 146360570041 + 254585839225 = 382571^2 + 504565^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400946409263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128845 + ... + 1440896.

Almost surely, 2^400946409266 is an apocalyptic number.

400946409266 is a deficient number, since it is larger than the sum of its proper divisors (286778223742).

400946409266 is a wasteful number, since it uses less digits than its factorization.

400946409266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570126.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 400946409266 in words is "four hundred billion, nine hundred forty-six million, four hundred nine thousand, two hundred sixty-six".