42057729682409 has 4 divisors (see below), whose sum is σ = 48065976779904. Its totient is φ = 36049482584916.

The previous prime is 42057729682393. The next prime is 42057729682447. The reversal of 42057729682409 is 90428692775024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42057729682409 - 2⁴ = 42057729682393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42057729684409) 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, 3004123548737 + ... + 3004123548750.

It is an arithmetic number, because the mean of its divisors is an integer number (12016494194976).

Almost surely, 2^{42057729682409} is an apocalyptic number.

It is an amenable number.

42057729682409 is a deficient number, since it is larger than the sum of its proper divisors (6008247097495).

42057729682409 is an equidigital number, since it uses as much as digits as its factorization.

42057729682409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6008247097494.

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 42057729682409 in words is "forty-two trillion, fifty-seven billion, seven hundred twenty-nine million, six hundred eighty-two thousand, four hundred nine".