400644222626 has 4 divisors (see below), whose sum is σ = 600966333942. Its totient is φ = 200322111312.

The previous prime is 400644222623. The next prime is 400644222637. The reversal of 400644222626 is 626222446004.

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

It can be written as a sum of positive squares in only one way, i.e., 240344082001 + 160300140625 = 490249^2 + 400375^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400644222626.

It is not an unprimeable number, because it can be changed into a prime (400644222623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100161055655 + ... + 100161055658.

Almost surely, 2^400644222626 is an apocalyptic number.

400644222626 is a deficient number, since it is larger than the sum of its proper divisors (200322111316).

400644222626 is a wasteful number, since it uses less digits than its factorization.

400644222626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200322111315.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 400644222626 in words is "four hundred billion, six hundred forty-four million, two hundred twenty-two thousand, six hundred twenty-six".