205454420255404 has 12 divisors (see below), whose sum is σ = 367195134073824. Its totient is φ = 100541524805744.

The previous prime is 205454420255369. The next prime is 205454420255443. The reversal of 205454420255404 is 404552024454502.

It is a happy number.

It is a super-2 number, since 2×205454420255404² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546421330279 + ... + 546421330654.

It is an arithmetic number, because the mean of its divisors is an integer number (30599594506152).

Almost surely, 2^{205454420255404} is an apocalyptic number.

It is an amenable number.

205454420255404 is a deficient number, since it is larger than the sum of its proper divisors (161740713818420).

205454420255404 is a wasteful number, since it uses less digits than its factorization.

205454420255404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092842660984 (or 1092842660982 counting only the distinct ones).

The product of its (nonzero) digits is 5120000, while the sum is 46.

The spelling of 205454420255404 in words is "two hundred five trillion, four hundred fifty-four billion, four hundred twenty million, two hundred fifty-five thousand, four hundred four".