201604404461 has 4 divisors (see below), whose sum is σ = 203054796000. Its totient is φ = 200154012924.

The previous prime is 201604404437. The next prime is 201604404481. The reversal of 201604404461 is 164404406102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201604404461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201604404481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 725195561 + ... + 725195838.

It is an arithmetic number, because the mean of its divisors is an integer number (50763699000).

Almost surely, 2^201604404461 is an apocalyptic number.

It is an amenable number.

201604404461 is a deficient number, since it is larger than the sum of its proper divisors (1450391539).

201604404461 is a wasteful number, since it uses less digits than its factorization.

201604404461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450391538.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 201604404461 in words is "two hundred one billion, six hundred four million, four hundred four thousand, four hundred sixty-one".