312297889561 has 8 divisors (see below), whose sum is σ = 358268955264. Its totient is φ = 266666094240.

The previous prime is 312297889559. The next prime is 312297889661. The reversal of 312297889561 is 165988792213.

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

It is not a de Polignac number, because 312297889561 - 2¹ = 312297889559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312297889561.

It is not an unprimeable number, because it can be changed into a prime (312297889661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84815620 + ... + 84819301.

It is an arithmetic number, because the mean of its divisors is an integer number (44783619408).

Almost surely, 2^312297889561 is an apocalyptic number.

It is an amenable number.

312297889561 is a deficient number, since it is larger than the sum of its proper divisors (45971065703).

312297889561 is a wasteful number, since it uses less digits than its factorization.

312297889561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169635191.

The product of its digits is 13063680, while the sum is 61.

The spelling of 312297889561 in words is "three hundred twelve billion, two hundred ninety-seven million, eight hundred eighty-nine thousand, five hundred sixty-one".