406205751626 has 12 divisors (see below), whose sum is σ = 647258646678. Its totient is φ = 191155647552.

The previous prime is 406205751613. The next prime is 406205751661. The reversal of 406205751626 is 626157502604.

It can be written as a sum of positive squares in 3 ways, for example, as 374183007025 + 32022744601 = 611705^2 + 178949^2 .

It is a super-2 number, since 2×406205751626² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 351388481 + ... + 351389636.

Almost surely, 2^406205751626 is an apocalyptic number.

406205751626 is a deficient number, since it is larger than the sum of its proper divisors (241052895052).

406205751626 is a wasteful number, since it uses less digits than its factorization.

406205751626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702778153 (or 702778136 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 406205751626 in words is "four hundred six billion, two hundred five million, seven hundred fifty-one thousand, six hundred twenty-six".