611111722840 has 32 divisors (see below), whose sum is σ = 1375099830000. Its totient is φ = 244427186304.

The previous prime is 611111722751. The next prime is 611111722843. The reversal of 611111722840 is 48227111116.

It is a junction number, because it is equal to n+sod(n) for n = 611111722796 and 611111722805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611111722843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26071 + ... + 1105849.

Almost surely, 2^611111722840 is an apocalyptic number.

It is an amenable number.

611111722840 is an abundant number, since it is smaller than the sum of its proper divisors (763988107160).

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

611111722840 is a wasteful number, since it uses less digits than its factorization.

611111722840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093939 (or 1093935 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

Adding to 611111722840 its reverse (48227111116), we get a palindrome (659338833956).

The spelling of 611111722840 in words is "six hundred eleven billion, one hundred eleven million, seven hundred twenty-two thousand, eight hundred forty".