31405446466 has 8 divisors (see below), whose sum is σ = 47117228940. Its totient is φ = 15699703488.

The previous prime is 31405446403. The next prime is 31405446563. The reversal of 31405446466 is 66464450413.

It can be written as a sum of positive squares in 2 ways, for example, as 18391428225 + 13014018241 = 135615^2 + 114079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1496851 + ... + 1517686.

Almost surely, 2^31405446466 is an apocalyptic number.

31405446466 is a deficient number, since it is larger than the sum of its proper divisors (15711782474).

31405446466 is a wasteful number, since it uses less digits than its factorization.

31405446466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019748.

The product of its (nonzero) digits is 829440, while the sum is 43.

Adding to 31405446466 its reverse (66464450413), we get a palindrome (97869896879).

The spelling of 31405446466 in words is "thirty-one billion, four hundred five million, four hundred forty-six thousand, four hundred sixty-six".