656111040 has 224 divisors, whose sum is σ = 2362321920. Its totient is φ = 152948736.

The previous prime is 656111033. The next prime is 656111077. The reversal of 656111040 is 40111656.

656111040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 656111040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 235737 + ... + 238503.

It is an arithmetic number, because the mean of its divisors is an integer number (10546080).

Almost surely, 2^656111040 is an apocalyptic number.

656111040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656111040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181160960).

656111040 is an abundant number, since it is smaller than the sum of its proper divisors (1706210880).

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

656111040 is a wasteful number, since it uses less digits than its factorization.

656111040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2809 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 656111040 is about 25614.6645498238. The cubic root of 656111040 is about 868.9453199187.

Adding to 656111040 its reverse (40111656), we get a palindrome (696222696).

The spelling of 656111040 in words is "six hundred fifty-six million, one hundred eleven thousand, forty".