611389644 has 12 divisors (see below), whose sum is σ = 1426575864. Its totient is φ = 203796544.

The previous prime is 611389633. The next prime is 611389651. The reversal of 611389644 is 446983116.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 611389596 and 611389605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25474557 + ... + 25474580.

It is an arithmetic number, because the mean of its divisors is an integer number (118881322).

Almost surely, 2^611389644 is an apocalyptic number.

It is an amenable number.

611389644 is an abundant number, since it is smaller than the sum of its proper divisors (815186220).

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

611389644 is a wasteful number, since it uses less digits than its factorization.

611389644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50949144 (or 50949142 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 611389644 is about 24726.2945869372. The cubic root of 611389644 is about 848.7361350702.

The spelling of 611389644 in words is "six hundred eleven million, three hundred eighty-nine thousand, six hundred forty-four".