611098640 has 20 divisors (see below), whose sum is σ = 1420804524. Its totient is φ = 244439424.

The previous prime is 611098619. The next prime is 611098667. The reversal of 611098640 is 46890116.

It can be written as a sum of positive squares in 2 ways, for example, as 152967424 + 458131216 = 12368^2 + 21404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 611098640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819287 + ... + 3819446.

Almost surely, 2^611098640 is an apocalyptic number.

It is an amenable number.

611098640 is an abundant number, since it is smaller than the sum of its proper divisors (809705884).

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

611098640 is a wasteful number, since it uses less digits than its factorization.

611098640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638746 (or 7638740 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 611098640 is about 24720.4093817234. The cubic root of 611098640 is about 848.6014556509.

The spelling of 611098640 in words is "six hundred eleven million, ninety-eight thousand, six hundred forty".