201665146534 has 16 divisors (see below), whose sum is σ = 302746054896. Its totient is φ = 100749829600.

The previous prime is 201665146523. The next prime is 201665146541. The reversal of 201665146534 is 435641566102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19744689 + ... + 19754899.

It is an arithmetic number, because the mean of its divisors is an integer number (18921628431).

Almost surely, 2^201665146534 is an apocalyptic number.

201665146534 is a deficient number, since it is larger than the sum of its proper divisors (101080908362).

201665146534 is a wasteful number, since it uses less digits than its factorization.

201665146534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17351.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 201665146534 in words is "two hundred one billion, six hundred sixty-five million, one hundred forty-six thousand, five hundred thirty-four".