42564504861 has 16 divisors (see below), whose sum is σ = 64400198400. Its totient is φ = 27772583904.

The previous prime is 42564504859. The next prime is 42564504889. The reversal of 42564504861 is 16840546524.

It is a happy number.

42564504861 is a `hidden beast` number, since 4 + 2 + 5 + 64 + 504 + 86 + 1 = 666.

42564504861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42564504861 - 2¹ = 42564504859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42564504811) 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, 16769616 + ... + 16772153.

It is an arithmetic number, because the mean of its divisors is an integer number (4025012400).

Almost surely, 2^42564504861 is an apocalyptic number.

It is an amenable number.

42564504861 is a deficient number, since it is larger than the sum of its proper divisors (21835693539).

42564504861 is a wasteful number, since it uses less digits than its factorization.

42564504861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33541825 (or 33541819 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 42564504861 in words is "forty-two billion, five hundred sixty-four million, five hundred four thousand, eight hundred sixty-one".