42661686529 has 8 divisors (see below), whose sum is σ = 53188596288. Its totient is φ = 33242872560.

The previous prime is 42661686527. The next prime is 42661686533. The reversal of 42661686529 is 92568616624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42661686529 - 2¹ = 42661686527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42661686529.

It is not an unprimeable number, because it can be changed into a prime (42661686523) 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 7 ways as a sum of consecutive naturals, for example, 277023862 + ... + 277024015.

It is an arithmetic number, because the mean of its divisors is an integer number (6648574536).

Almost surely, 2^42661686529 is an apocalyptic number.

It is an amenable number.

42661686529 is a deficient number, since it is larger than the sum of its proper divisors (10526909759).

42661686529 is a wasteful number, since it uses less digits than its factorization.

42661686529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554047895.

The product of its digits is 7464960, while the sum is 55.

The spelling of 42661686529 in words is "forty-two billion, six hundred sixty-one million, six hundred eighty-six thousand, five hundred twenty-nine".