611116640 has 48 divisors (see below), whose sum is σ = 1490348160. Its totient is φ = 236559360.

The previous prime is 611116579. The next prime is 611116651. The reversal of 611116640 is 46611116.

It is a super-3 number, since 3×611116640³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 56645 + ... + 66564.

It is an arithmetic number, because the mean of its divisors is an integer number (31048920).

Almost surely, 2^611116640 is an apocalyptic number.

It is an amenable number.

611116640 is an abundant number, since it is smaller than the sum of its proper divisors (879231520).

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

611116640 is a wasteful number, since it uses less digits than its factorization.

611116640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123255 (or 123247 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 611116640 is about 24720.7734506831. The cubic root of 611116640 is about 848.6097874625.

Adding to 611116640 its reverse (46611116), we get a palindrome (657727756).

The spelling of 611116640 in words is "six hundred eleven million, one hundred sixteen thousand, six hundred forty".