656132231656 has 64 divisors (see below), whose sum is σ = 1370994958080. Its totient is φ = 291821556480.

The previous prime is 656132231639. The next prime is 656132231681.

656132231656 is nontrivially palindromic in base 10.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18068590 + ... + 18104866.

It is an arithmetic number, because the mean of its divisors is an integer number (21421796220).

Almost surely, 2^656132231656 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 656132231656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685497479040).

656132231656 is an abundant number, since it is smaller than the sum of its proper divisors (714862726424).

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

656132231656 is a wasteful number, since it uses less digits than its factorization.

656132231656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40714 (or 40710 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 46.

It can be divided in two parts, 656132 and 231656, that added together give a palindrome (887788).

The spelling of 656132231656 in words is "six hundred fifty-six billion, one hundred thirty-two million, two hundred thirty-one thousand, six hundred fifty-six".