201668368517 has 16 divisors (see below), whose sum is σ = 260100720000. Its totient is φ = 151725416640.

The previous prime is 201668368501. The next prime is 201668368523. The reversal of 201668368517 is 715863866102.

It is not a de Polignac number, because 201668368517 - 2⁴ = 201668368501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201668368567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45154142 + ... + 45158607.

It is an arithmetic number, because the mean of its divisors is an integer number (16256295000).

Almost surely, 2^201668368517 is an apocalyptic number.

It is an amenable number.

201668368517 is a deficient number, since it is larger than the sum of its proper divisors (58432351483).

201668368517 is a wasteful number, since it uses less digits than its factorization.

201668368517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90312796.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 201668368517 in words is "two hundred one billion, six hundred sixty-eight million, three hundred sixty-eight thousand, five hundred seventeen".