404454643656423 has 64 divisors (see below), whose sum is σ = 567564107120640. Its totient is φ = 255703127961600.

The previous prime is 404454643656419. The next prime is 404454643656449. The reversal of 404454643656423 is 324656346454404.

It is not a de Polignac number, because 404454643656423 - 2² = 404454643656419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404454643656463) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4898817063 + ... + 4898899623.

It is an arithmetic number, because the mean of its divisors is an integer number (8868189173760).

Almost surely, 2^{404454643656423} is an apocalyptic number.

404454643656423 is a deficient number, since it is larger than the sum of its proper divisors (163109463464217).

404454643656423 is a wasteful number, since it uses less digits than its factorization.

404454643656423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84020.

The product of its (nonzero) digits is 398131200, while the sum is 60.

The spelling of 404454643656423 in words is "four hundred four trillion, four hundred fifty-four billion, six hundred forty-three million, six hundred fifty-six thousand, four hundred twenty-three".