564012261 has 16 divisors (see below), whose sum is σ = 837793600. Its totient is φ = 375009264.

The previous prime is 564012259. The next prime is 564012287. The reversal of 564012261 is 162210465.

564012261 is a `hidden beast` number, since 5 + 640 + 12 + 2 + 6 + 1 = 666.

It is not a de Polignac number, because 564012261 - 2¹ = 564012259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564012661) 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, 17326 + ... + 37791.

It is an arithmetic number, because the mean of its divisors is an integer number (52362100).

Almost surely, 2^564012261 is an apocalyptic number.

It is an amenable number.

564012261 is a deficient number, since it is larger than the sum of its proper divisors (273781339).

564012261 is a wasteful number, since it uses less digits than its factorization.

564012261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55505 (or 55499 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 564012261 is about 23748.9423132905. The cubic root of 564012261 is about 826.2209096515.

The spelling of 564012261 in words is "five hundred sixty-four million, twelve thousand, two hundred sixty-one".