611311040 has 56 divisors (see below), whose sum is σ = 1495056192. Its totient is φ = 237911040.

The previous prime is 611311037. The next prime is 611311049. The reversal of 611311040 is 40113116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611311049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13976 + ... + 37655.

It is an arithmetic number, because the mean of its divisors is an integer number (26697432).

Almost surely, 2^611311040 is an apocalyptic number.

It is an amenable number.

611311040 is an abundant number, since it is smaller than the sum of its proper divisors (883745152).

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

611311040 is a wasteful number, since it uses less digits than its factorization.

611311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51685 (or 51675 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 611311040 is about 24724.7050538525. The cubic root of 611311040 is about 848.6997606048.

Adding to 611311040 its reverse (40113116), we get a palindrome (651424156).

The spelling of 611311040 in words is "six hundred eleven million, three hundred eleven thousand, forty".