201689551701 has 24 divisors (see below), whose sum is σ = 328065903360. Its totient is φ = 118292990400.

The previous prime is 201689551633. The next prime is 201689551703. The reversal of 201689551701 is 107155986102.

201689551701 is a `hidden beast` number, since 2 + 0 + 16 + 89 + 551 + 7 + 0 + 1 = 666.

It is not a de Polignac number, because 201689551701 - 2¹⁹ = 201689027413 is a prime.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 32856096 + ... + 32862233.

It is an arithmetic number, because the mean of its divisors is an integer number (13669412640).

Almost surely, 2^201689551701 is an apocalyptic number.

It is an amenable number.

201689551701 is a deficient number, since it is larger than the sum of its proper divisors (126376351659).

201689551701 is a wasteful number, since it uses less digits than its factorization.

201689551701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65718377 (or 65718374 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 201689551701 in words is "two hundred one billion, six hundred eighty-nine million, five hundred fifty-one thousand, seven hundred one".