613187648 has 14 divisors (see below), whose sum is σ = 1216794366. Its totient is φ = 306593792.

The previous prime is 613187647. The next prime is 613187681. The reversal of 613187648 is 846781316.

It can be written as a sum of positive squares in only one way, i.e., 406748224 + 206439424 = 20168^2 + 14368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 613187599 and 613187608.

It is not an unprimeable number, because it can be changed into a prime (613187647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4790465 + ... + 4790592.

Almost surely, 2^613187648 is an apocalyptic number.

It is an amenable number.

613187648 is a deficient number, since it is larger than the sum of its proper divisors (603606718).

613187648 is an equidigital number, since it uses as much as digits as its factorization.

613187648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9581069 (or 9581059 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 613187648 is about 24762.6260319862. The cubic root of 613187648 is about 849.5673221200.

The spelling of 613187648 in words is "six hundred thirteen million, one hundred eighty-seven thousand, six hundred forty-eight".