611663125 has 20 divisors (see below), whose sum is σ = 768888252. Its totient is φ = 486416000.

The previous prime is 611663113. The next prime is 611663147. The reversal of 611663125 is 521366116.

611663125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 466171281 + 145491844 = 21591^2 + 12062^2 .

It is not a de Polignac number, because 611663125 - 2⁵ = 611663093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105297 + ... + 110953.

Almost surely, 2^611663125 is an apocalyptic number.

It is an amenable number.

611663125 is a deficient number, since it is larger than the sum of its proper divisors (157225127).

611663125 is an equidigital number, since it uses as much as digits as its factorization.

611663125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850 (or 5835 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 611663125 is about 24731.8241340990. The cubic root of 611663125 is about 848.8626657308.

The spelling of 611663125 in words is "six hundred eleven million, six hundred sixty-three thousand, one hundred twenty-five".