564778344451247 has 32 divisors (see below), whose sum is σ = 580504082184000. Its totient is φ = 549266744704000.

The previous prime is 564778344451229. The next prime is 564778344451261. The reversal of 564778344451247 is 742154443877465.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 564778344451247 - 2²⁰ = 564778343402671 is a prime.

It is a super-2 number, since 2×564778344451247² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564778344051247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68070183203 + ... + 68070191499.

It is an arithmetic number, because the mean of its divisors is an integer number (18140752568250).

Almost surely, 2^{564778344451247} is an apocalyptic number.

564778344451247 is a deficient number, since it is larger than the sum of its proper divisors (15725737732753).

564778344451247 is a wasteful number, since it uses less digits than its factorization.

564778344451247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16267.

The product of its digits is 2528870400, while the sum is 71.

The spelling of 564778344451247 in words is "five hundred sixty-four trillion, seven hundred seventy-eight billion, three hundred forty-four million, four hundred fifty-one thousand, two hundred forty-seven".