611685680 has 20 divisors (see below), whose sum is σ = 1422169392. Its totient is φ = 244674240.

The previous prime is 611685673. The next prime is 611685691. The reversal of 611685680 is 86586116.

It is a happy number.

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

It is a super-2 number, since 2×611685680² = 748318742234124800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3822956 + ... + 3823115.

Almost surely, 2^611685680 is an apocalyptic number.

It is an amenable number.

611685680 is an abundant number, since it is smaller than the sum of its proper divisors (810483712).

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

611685680 is a wasteful number, since it uses less digits than its factorization.

611685680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7646084 (or 7646078 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 611685680 is about 24732.2801213313. The cubic root of 611685680 is about 848.8730995036.

The spelling of 611685680 in words is "six hundred eleven million, six hundred eighty-five thousand, six hundred eighty".