42660938849 has 4 divisors (see below), whose sum is σ = 44906251440. Its totient is φ = 40415626260.

The previous prime is 42660938819. The next prime is 42660938857. The reversal of 42660938849 is 94883906624.

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 42660938849 - 2¹² = 42660934753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42660938819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122656267 + ... + 1122656304.

It is an arithmetic number, because the mean of its divisors is an integer number (11226562860).

Almost surely, 2^42660938849 is an apocalyptic number.

It is an amenable number.

42660938849 is a deficient number, since it is larger than the sum of its proper divisors (2245312591).

42660938849 is a wasteful number, since it uses less digits than its factorization.

42660938849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245312590.

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 42660938849 in words is "forty-two billion, six hundred sixty million, nine hundred thirty-eight thousand, eight hundred forty-nine".