656232663636 has 384 divisors, whose sum is σ = 1984982630400. Its totient is φ = 185399902080.

The previous prime is 656232663629. The next prime is 656232663637. The reversal of 656232663636 is 636366232656.

656232663636 is a `hidden beast` number, since 6 + 5 + 623 + 2 + 6 + 6 + 3 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (25194240) is a multiple of the sum of its prime factors (1944).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656232663637) 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 127 ways as a sum of consecutive naturals, for example, 403338255 + ... + 403339881.

It is an arithmetic number, because the mean of its divisors is an integer number (5169225600).

Almost surely, 2^656232663636 is an apocalyptic number.

656232663636 is a gapful number since it is divisible by the number (66) 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 656232663636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992491315200).

656232663636 is an abundant number, since it is smaller than the sum of its proper divisors (1328749966764).

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

656232663636 is a wasteful number, since it uses less digits than its factorization.

656232663636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 1936 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 54.

The spelling of 656232663636 in words is "six hundred fifty-six billion, two hundred thirty-two million, six hundred sixty-three thousand, six hundred thirty-six".