400446766361 has 4 divisors (see below), whose sum is σ = 401140782132. Its totient is φ = 399752750592.

The previous prime is 400446766339. The next prime is 400446766373. The reversal of 400446766361 is 163667644004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 280429557136 + 120017209225 = 529556^2 + 346435^2 .

It is a cyclic number.

It is not a de Polignac number, because 400446766361 - 2⁶ = 400446766297 is a prime.

It is a super-2 number, since 2×400446766361² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400446766331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 347007020 + ... + 347008173.

It is an arithmetic number, because the mean of its divisors is an integer number (100285195533).

Almost surely, 2^400446766361 is an apocalyptic number.

It is an amenable number.

400446766361 is a deficient number, since it is larger than the sum of its proper divisors (694015771).

400446766361 is an equidigital number, since it uses as much as digits as its factorization.

400446766361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694015770.

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 400446766361 in words is "four hundred billion, four hundred forty-six million, seven hundred sixty-six thousand, three hundred sixty-one".