201612656 has 80 divisors (see below), whose sum is σ = 482558400. Its totient is φ = 81285120.

The previous prime is 201612599. The next prime is 201612659. The reversal of 201612656 is 656216102.

201612656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201612659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92216 + ... + 94376.

It is an arithmetic number, because the mean of its divisors is an integer number (6031980).

Almost surely, 2^201612656 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 201612656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241279200).

201612656 is an abundant number, since it is smaller than the sum of its proper divisors (280945744).

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

201612656 is a wasteful number, since it uses less digits than its factorization.

201612656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 201612656 is about 14199.0371504550. The cubic root of 201612656 is about 586.3711533971.

Adding to 201612656 its reverse (656216102), we get a palindrome (857828758).

The spelling of 201612656 in words is "two hundred one million, six hundred twelve thousand, six hundred fifty-six".