42729125569 has 8 divisors (see below), whose sum is σ = 46254408872. Its totient is φ = 39237903360.

The previous prime is 42729125563. The next prime is 42729125597. The reversal of 42729125569 is 96552192724.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2061160000 + 40667965569 = 45400^2 + 201663^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42729125569 is a prime.

It is a super-2 number, since 2×42729125569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42729125563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8512662 + ... + 8517679.

It is an arithmetic number, because the mean of its divisors is an integer number (5781801109).

Almost surely, 2^42729125569 is an apocalyptic number.

It is an amenable number.

42729125569 is a deficient number, since it is larger than the sum of its proper divisors (3525283303).

42729125569 is a wasteful number, since it uses less digits than its factorization.

42729125569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17030547.

The product of its digits is 2721600, while the sum is 52.

The spelling of 42729125569 in words is "forty-two billion, seven hundred twenty-nine million, one hundred twenty-five thousand, five hundred sixty-nine".