400466638426 has 16 divisors (see below), whose sum is σ = 623780653608. Its totient is φ = 192673555200.

The previous prime is 400466638421. The next prime is 400466638427. The reversal of 400466638426 is 624836664004.

It can be written as a sum of positive squares in 4 ways, for example, as 265374371025 + 135092267401 = 515145^2 + 367549^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400466638426.

It is not an unprimeable number, because it can be changed into a prime (400466638421) 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, 33444285 + ... + 33456256.

Almost surely, 2^400466638426 is an apocalyptic number.

400466638426 is a deficient number, since it is larger than the sum of its proper divisors (223314015182).

400466638426 is a wasteful number, since it uses less digits than its factorization.

400466638426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66900657.

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 400466638426 in words is "four hundred billion, four hundred sixty-six million, six hundred thirty-eight thousand, four hundred twenty-six".