201604995697 has 32 divisors (see below), whose sum is σ = 238799683584. Its totient is φ = 166618166400.

The previous prime is 201604995673. The next prime is 201604995737. The reversal of 201604995697 is 796599406102.

It is a de Polignac number, because none of the positive numbers 2^k-201604995697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201604995797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9575572 + ... + 9596602.

It is an arithmetic number, because the mean of its divisors is an integer number (7462490112).

Almost surely, 2^201604995697 is an apocalyptic number.

It is an amenable number.

201604995697 is a deficient number, since it is larger than the sum of its proper divisors (37194687887).

201604995697 is a wasteful number, since it uses less digits than its factorization.

201604995697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21469.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 201604995697 in words is "two hundred one billion, six hundred four million, nine hundred ninety-five thousand, six hundred ninety-seven".