404241521965 has 16 divisors (see below), whose sum is σ = 485980031808. Its totient is φ = 322799976576.

The previous prime is 404241521947. The next prime is 404241521977. The reversal of 404241521965 is 569125142404.

It is a cyclic number.

It is not a de Polignac number, because 404241521965 - 2⁵ = 404241521933 is a prime.

It is a super-2 number, since 2×404241521965² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18261394 + ... + 18283516.

It is an arithmetic number, because the mean of its divisors is an integer number (30373751988).

Almost surely, 2^404241521965 is an apocalyptic number.

It is an amenable number.

404241521965 is a deficient number, since it is larger than the sum of its proper divisors (81738509843).

404241521965 is a wasteful number, since it uses less digits than its factorization.

404241521965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28668.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 404241521965 in words is "four hundred four billion, two hundred forty-one million, five hundred twenty-one thousand, nine hundred sixty-five".