42725449729 has 8 divisors (see below), whose sum is σ = 42867288360. Its totient is φ = 42583776000.

The previous prime is 42725449651. The next prime is 42725449747. The reversal of 42725449729 is 92794452724.

It can be written as a sum of positive squares in 4 ways, for example, as 1668559104 + 41056890625 = 40848^2 + 202625^2 .

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 42725449729 - 2³¹ = 40577966081 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 42725449729.

It is not an unprimeable number, because it can be changed into a prime (42725449769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489079 + ... + 569779.

It is an arithmetic number, because the mean of its divisors is an integer number (5358411045).

Almost surely, 2^42725449729 is an apocalyptic number.

It is an amenable number.

42725449729 is a deficient number, since it is larger than the sum of its proper divisors (141838631).

42725449729 is a wasteful number, since it uses less digits than its factorization.

42725449729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82451.

The product of its digits is 10160640, while the sum is 55.

The spelling of 42725449729 in words is "forty-two billion, seven hundred twenty-five million, four hundred forty-nine thousand, seven hundred twenty-nine".