201921848856 has 96 divisors (see below), whose sum is σ = 673072851360. Its totient is φ = 53254112256.

The previous prime is 201921848833. The next prime is 201921848939. The reversal of 201921848856 is 658848129102.

201921848856 is a `hidden beast` number, since 20 + 1 + 92 + 1 + 8 + 488 + 56 = 666.

201921848856 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15402625 + ... + 15415728.

It is an arithmetic number, because the mean of its divisors is an integer number (7011175535).

Almost surely, 2^201921848856 is an apocalyptic number.

201921848856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

201921848856 is an abundant number, since it is smaller than the sum of its proper divisors (471151002504).

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

201921848856 is a wasteful number, since it uses less digits than its factorization.

201921848856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30818385 (or 30818378 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 201921848856 in words is "two hundred one billion, nine hundred twenty-one million, eight hundred forty-eight thousand, eight hundred fifty-six".