201689551700 has 324 divisors, whose sum is σ = 558457381440. Its totient is φ = 63002983680.

The previous prime is 201689551633. The next prime is 201689551703. The reversal of 201689551700 is 7155986102.

201689551700 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×201689551700³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201689551703) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 65418359 + ... + 65421441.

Almost surely, 2^201689551700 is an apocalyptic number.

201689551700 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 201689551700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279228690720).

201689551700 is an abundant number, since it is smaller than the sum of its proper divisors (356767829740).

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

201689551700 is a wasteful number, since it uses less digits than its factorization.

201689551700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3189 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 201689551700 in words is "two hundred one billion, six hundred eighty-nine million, five hundred fifty-one thousand, seven hundred".