312643021466 has 8 divisors (see below), whose sum is σ = 469092083220. Its totient is φ = 156278993728.

The previous prime is 312643021441. The next prime is 312643021469. The reversal of 312643021466 is 664120346213.

It can be written as a sum of positive squares in 2 ways, for example, as 312233970841 + 409050625 = 558779^2 + 20225^2 .

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

It is not an unprimeable number, because it can be changed into a prime (312643021469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21249311 + ... + 21264018.

Almost surely, 2^312643021466 is an apocalyptic number.

312643021466 is a deficient number, since it is larger than the sum of its proper divisors (156449061754).

312643021466 is a wasteful number, since it uses less digits than its factorization.

312643021466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42517008.

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 312643021466 its reverse (664120346213), we get a palindrome (976763367679).

The spelling of 312643021466 in words is "three hundred twelve billion, six hundred forty-three million, twenty-one thousand, four hundred sixty-six".