564778404375081 has 16 divisors (see below), whose sum is σ = 811884366558720. Its totient is φ = 347161439496960.

The previous prime is 564778404375077. The next prime is 564778404375127. The reversal of 564778404375081 is 180573404877465.

It is not a de Polignac number, because 564778404375081 - 2² = 564778404375077 is a prime.

It is a super-2 number, since 2×564778404375081² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 564778404374997 and 564778404375015.

It is not an unprimeable number, because it can be changed into a prime (564778404375001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8218749721 + ... + 8218818438.

It is an arithmetic number, because the mean of its divisors is an integer number (50742772909920).

Almost surely, 2^{564778404375081} is an apocalyptic number.

It is an amenable number.

564778404375081 is a deficient number, since it is larger than the sum of its proper divisors (247105962183639).

564778404375081 is a wasteful number, since it uses less digits than its factorization.

564778404375081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16437569056.

The product of its (nonzero) digits is 632217600, while the sum is 69.

The spelling of 564778404375081 in words is "five hundred sixty-four trillion, seven hundred seventy-eight billion, four hundred four million, three hundred seventy-five thousand, eighty-one".