613123780 has 12 divisors (see below), whose sum is σ = 1287559980. Its totient is φ = 245249504.

The previous prime is 613123729. The next prime is 613123783. The reversal of 613123780 is 87321316.

It can be written as a sum of positive squares in 2 ways, for example, as 415833664 + 197290116 = 20392^2 + 14046^2 .

It is not an unprimeable number, because it can be changed into a prime (613123783) 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, 15328075 + ... + 15328114.

It is an arithmetic number, because the mean of its divisors is an integer number (107296665).

Almost surely, 2^613123780 is an apocalyptic number.

It is an amenable number.

613123780 is an abundant number, since it is smaller than the sum of its proper divisors (674436200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613123780 is a wasteful number, since it uses less digits than its factorization.

613123780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30656198 (or 30656196 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 613123780 is about 24761.3363936602. The cubic root of 613123780 is about 849.5378248691.

The spelling of 613123780 in words is "six hundred thirteen million, one hundred twenty-three thousand, seven hundred eighty".