612311909849 has 4 divisors (see below), whose sum is σ = 612313483236. Its totient is φ = 612310336464.

The previous prime is 612311909701. The next prime is 612311910029. The reversal of 612311909849 is 948909113216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 540041265625 + 72270644224 = 734875^2 + 268832^2 .

It is a cyclic number.

It is not a de Polignac number, because 612311909849 - 2²⁰ = 612310861273 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 612311909849.

It is not an unprimeable number, because it can be changed into a prime (612310909849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271727 + ... + 1139499.

It is an arithmetic number, because the mean of its divisors is an integer number (153078370809).

Almost surely, 2^612311909849 is an apocalyptic number.

It is an amenable number.

612311909849 is a deficient number, since it is larger than the sum of its proper divisors (1573387).

612311909849 is an equidigital number, since it uses as much as digits as its factorization.

612311909849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573386.

The product of its (nonzero) digits is 839808, while the sum is 53.

The spelling of 612311909849 in words is "six hundred twelve billion, three hundred eleven million, nine hundred nine thousand, eight hundred forty-nine".