564778388135854 has 4 divisors (see below), whose sum is σ = 847167582203784. Its totient is φ = 282389194067926.

The previous prime is 564778388135833. The next prime is 564778388135867. The reversal of 564778388135854 is 458531883877465.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141194597033962 + ... + 141194597033965.

It is an arithmetic number, because the mean of its divisors is an integer number (211791895550946).

Almost surely, 2^{564778388135854} is an apocalyptic number.

564778388135854 is a deficient number, since it is larger than the sum of its proper divisors (282389194067930).

564778388135854 is a wasteful number, since it uses less digits than its factorization.

564778388135854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282389194067929.

The product of its digits is 21676032000, while the sum is 82.

The spelling of 564778388135854 in words is "five hundred sixty-four trillion, seven hundred seventy-eight billion, three hundred eighty-eight million, one hundred thirty-five thousand, eight hundred fifty-four".