611811040 has 144 divisors (see below), whose sum is σ = 1567478304. Its totient is φ = 225223680.

The previous prime is 611811023. The next prime is 611811043. The reversal of 611811040 is 40118116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611811043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3536394 + ... + 3536566.

It is an arithmetic number, because the mean of its divisors is an integer number (10885266).

Almost surely, 2^611811040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611811040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783739152).

611811040 is an abundant number, since it is smaller than the sum of its proper divisors (955667264).

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

611811040 is a wasteful number, since it uses less digits than its factorization.

611811040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 611811040 is about 24734.8143312215. The cubic root of 611811040 is about 848.9310854194.

Adding to 611811040 its reverse (40118116), we get a palindrome (651929156).

The spelling of 611811040 in words is "six hundred eleven million, eight hundred eleven thousand, forty".