610423287821 has 4 divisors (see below), whose sum is σ = 613043130492. Its totient is φ = 607803445152.

The previous prime is 610423287811. The next prime is 610423287823. The reversal of 610423287821 is 128782324016.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42828302500 + 567594985321 = 206950^2 + 753389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-610423287821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610423287823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309920986 + ... + 1309921451.

It is an arithmetic number, because the mean of its divisors is an integer number (153260782623).

Almost surely, 2^610423287821 is an apocalyptic number.

It is an amenable number.

610423287821 is a deficient number, since it is larger than the sum of its proper divisors (2619842671).

610423287821 is a wasteful number, since it uses less digits than its factorization.

610423287821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619842670.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 610423287821 in words is "six hundred ten billion, four hundred twenty-three million, two hundred eighty-seven thousand, eight hundred twenty-one".