42566540260241 has 4 divisors (see below), whose sum is σ = 42566651176500. Its totient is φ = 42566429343984.

The previous prime is 42566540260187. The next prime is 42566540260261. The reversal of 42566540260241 is 14206204566524.

It is a happy number.

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 15557731260241 + 27008809000000 = 3944329^2 + 5197000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42566540260241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42566540260261) 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, 54880466 + ... + 55650683.

It is an arithmetic number, because the mean of its divisors is an integer number (10641662794125).

Almost surely, 2^{42566540260241} is an apocalyptic number.

It is an amenable number.

42566540260241 is a deficient number, since it is larger than the sum of its proper divisors (110916259).

42566540260241 is a wasteful number, since it uses less digits than its factorization.

42566540260241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110916258.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 42566540260241 in words is "forty-two trillion, five hundred sixty-six billion, five hundred forty million, two hundred sixty thousand, two hundred forty-one".