612944818 has 4 divisors (see below), whose sum is σ = 919417230. Its totient is φ = 306472408.

The previous prime is 612944797. The next prime is 612944837. The reversal of 612944818 is 818449216.

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

It can be written as a sum of positive squares in only one way, i.e., 611424529 + 1520289 = 24727^2 + 1233^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153236203 + ... + 153236206.

Almost surely, 2^612944818 is an apocalyptic number.

612944818 is a deficient number, since it is larger than the sum of its proper divisors (306472412).

612944818 is a wasteful number, since it uses less digits than its factorization.

612944818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306472411.

The product of its digits is 110592, while the sum is 43.

The square root of 612944818 is about 24757.7223912055. The cubic root of 612944818 is about 849.4551608743.

The spelling of 612944818 in words is "six hundred twelve million, nine hundred forty-four thousand, eight hundred eighteen".