610809812 has 6 divisors (see below), whose sum is σ = 1068917178. Its totient is φ = 305404904.

The previous prime is 610809809. The next prime is 610809817. The reversal of 610809812 is 218908016.

It can be written as a sum of positive squares in only one way, i.e., 393070276 + 217739536 = 19826^2 + 14756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610809817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76351223 + ... + 76351230.

It is an arithmetic number, because the mean of its divisors is an integer number (178152863).

Almost surely, 2^610809812 is an apocalyptic number.

It is an amenable number.

610809812 is a deficient number, since it is larger than the sum of its proper divisors (458107366).

610809812 is a wasteful number, since it uses less digits than its factorization.

610809812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152702457 (or 152702455 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 610809812 is about 24714.5667977410. The cubic root of 610809812 is about 848.4677410208.

The spelling of 610809812 in words is "six hundred ten million, eight hundred nine thousand, eight hundred twelve".