201091766400 has 1440 divisors, whose sum is σ = 879311220480. Its totient is φ = 45113241600.

The previous prime is 201091766353. The next prime is 201091766423. The reversal of 201091766400 is 4667190102.

201091766400 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 9 + 1 + 7 + 6 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 179 ways as a sum of consecutive naturals, for example, 901756689 + ... + 901756911.

It is an arithmetic number, because the mean of its divisors is an integer number (610632792).

Almost surely, 2^201091766400 is an apocalyptic number.

201091766400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201091766400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439655610240).

201091766400 is an abundant number, since it is smaller than the sum of its proper divisors (678219454080).

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

201091766400 is a wasteful number, since it uses less digits than its factorization.

201091766400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 201091766400 in words is "two hundred one billion, ninety-one million, seven hundred sixty-six thousand, four hundred".