42556745461 has 4 divisors (see below), whose sum is σ = 42827807692. Its totient is φ = 42285683232.

The previous prime is 42556745453. The next prime is 42556745467. The reversal of 42556745461 is 16454765524.

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 27479361361 + 15077384100 = 165769^2 + 122790^2 .

It is a cyclic number.

It is not a de Polignac number, because 42556745461 - 2³ = 42556745453 is a prime.

It is a super-2 number, since 2×42556745461² (a number of 22 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 (42556745467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135530880 + ... + 135531193.

It is an arithmetic number, because the mean of its divisors is an integer number (10706951923).

Almost surely, 2^42556745461 is an apocalyptic number.

It is an amenable number.

42556745461 is a deficient number, since it is larger than the sum of its proper divisors (271062231).

42556745461 is a wasteful number, since it uses less digits than its factorization.

42556745461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271062230.

The product of its digits is 4032000, while the sum is 49.

The spelling of 42556745461 in words is "forty-two billion, five hundred fifty-six million, seven hundred forty-five thousand, four hundred sixty-one".