64205181904454 has 16 divisors (see below), whose sum is σ = 96335968855392. Its totient is φ = 32093192721408.

The previous prime is 64205181904453. The next prime is 64205181904469. The reversal of 64205181904454 is 45440918150246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64205181904396 and 64205181904405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64205181904453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400343807 + ... + 400504149.

It is an arithmetic number, because the mean of its divisors is an integer number (6020998053462).

Almost surely, 2^{64205181904454} is an apocalyptic number.

64205181904454 is a deficient number, since it is larger than the sum of its proper divisors (32130786950938).

64205181904454 is a wasteful number, since it uses less digits than its factorization.

64205181904454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217711.

The product of its (nonzero) digits is 5529600, while the sum is 53.

The spelling of 64205181904454 in words is "sixty-four trillion, two hundred five billion, one hundred eighty-one million, nine hundred four thousand, four hundred fifty-four".