564778404387077 has 4 divisors (see below), whose sum is σ = 565325140500780. Its totient is φ = 564231668273376.

The previous prime is 564778404387011. The next prime is 564778404387079. The reversal of 564778404387077 is 770783404877465.

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

It can be written as a sum of positive squares in 2 ways, for example, as 532611346483876 + 32167057903201 = 23078374^2 + 5671601^2 .

It is a cyclic number.

It is not a de Polignac number, because 564778404387077 - 2²⁴ = 564778387609861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 564778404386989 and 564778404387007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564778404387079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273368055302 + ... + 273368057367.

It is an arithmetic number, because the mean of its divisors is an integer number (141331285125195).

Almost surely, 2^{564778404387077} is an apocalyptic number.

It is an amenable number.

564778404387077 is a deficient number, since it is larger than the sum of its proper divisors (546736113703).

564778404387077 is a wasteful number, since it uses less digits than its factorization.

564778404387077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546736113702.

The product of its (nonzero) digits is 6195732480, while the sum is 77.

The spelling of 564778404387077 in words is "five hundred sixty-four trillion, seven hundred seventy-eight billion, four hundred four million, three hundred eighty-seven thousand, seventy-seven".