201556835664 has 40 divisors (see below), whose sum is σ = 531766976640. Its totient is φ = 65756130048.

The previous prime is 201556835611. The next prime is 201556835687. The reversal of 201556835664 is 466538655102.

201556835664 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44669029 + ... + 44673540.

It is an arithmetic number, because the mean of its divisors is an integer number (13294174416).

Almost surely, 2^201556835664 is an apocalyptic number.

201556835664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

201556835664 is an abundant number, since it is smaller than the sum of its proper divisors (330210140976).

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

201556835664 is a wasteful number, since it uses less digits than its factorization.

201556835664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89342627 (or 89342621 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 51.

The spelling of 201556835664 in words is "two hundred one billion, five hundred fifty-six million, eight hundred thirty-five thousand, six hundred sixty-four".