610507225981 has 4 divisors (see below), whose sum is σ = 610762350492. Its totient is φ = 610252101472.

The previous prime is 610507225927. The next prime is 610507225987. The reversal of 610507225981 is 189522705016.

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 19815066756 + 590692159225 = 140766^2 + 768565^2 .

It is a cyclic number.

It is not a de Polignac number, because 610507225981 - 2⁹ = 610507225469 is a prime.

It is a super-2 number, since 2×610507225981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610507225987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127558666 + ... + 127563451.

It is an arithmetic number, because the mean of its divisors is an integer number (152690587623).

Almost surely, 2^610507225981 is an apocalyptic number.

It is an amenable number.

610507225981 is a deficient number, since it is larger than the sum of its proper divisors (255124511).

610507225981 is a wasteful number, since it uses less digits than its factorization.

610507225981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255124510.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 610507225981 in words is "six hundred ten billion, five hundred seven million, two hundred twenty-five thousand, nine hundred eighty-one".