400166116250 has 40 divisors (see below), whose sum is σ = 767514991584. Its totient is φ = 156343950000.

The previous prime is 400166116211. The next prime is 400166116327. The reversal of 400166116250 is 52611661004.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3668726 + ... + 3776225.

Almost surely, 2^400166116250 is an apocalyptic number.

400166116250 is a deficient number, since it is larger than the sum of its proper divisors (367348875334).

400166116250 is an equidigital number, since it uses as much as digits as its factorization.

400166116250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7445016 (or 7445001 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 400166116250 its reverse (52611661004), we get a palindrome (452777777254).

The spelling of 400166116250 in words is "four hundred billion, one hundred sixty-six million, one hundred sixteen thousand, two hundred fifty".