42561064773 has 12 divisors (see below), whose sum is σ = 61558963648. Its totient is φ = 28336257000.

The previous prime is 42561064759. The next prime is 42561064823. The reversal of 42561064773 is 37746016524.

42561064773 is a `hidden beast` number, since 4 + 25 + 610 + 6 + 4 + 7 + 7 + 3 = 666.

It is not a de Polignac number, because 42561064773 - 2¹⁰ = 42561063749 is a prime.

It is a super-2 number, since 2×42561064773² (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 (42561064373) 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 11 ways as a sum of consecutive naturals, for example, 3141715 + ... + 3155232.

Almost surely, 2^42561064773 is an apocalyptic number.

It is an amenable number.

42561064773 is a deficient number, since it is larger than the sum of its proper divisors (18997898875).

42561064773 is a wasteful number, since it uses less digits than its factorization.

42561064773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297704 (or 6297701 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 42561064773 in words is "forty-two billion, five hundred sixty-one million, sixty-four thousand, seven hundred seventy-three".