656212631632 has 80 divisors (see below), whose sum is σ = 1414195200000. Its totient is φ = 293559057792.

The previous prime is 656212631497. The next prime is 656212631653. The reversal of 656212631632 is 236136212656.

It is a super-3 number, since 3×656212631632³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41632 + ... + 1146367.

It is an arithmetic number, because the mean of its divisors is an integer number (17677440000).

Almost surely, 2^656212631632 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 656212631632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707097600000).

656212631632 is an abundant number, since it is smaller than the sum of its proper divisors (757982568368).

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

656212631632 is a wasteful number, since it uses less digits than its factorization.

656212631632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188128 (or 1188122 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The spelling of 656212631632 in words is "six hundred fifty-six billion, two hundred twelve million, six hundred thirty-one thousand, six hundred thirty-two".