42920550709 has 4 divisors (see below), whose sum is σ = 45445289004. Its totient is φ = 40395812416.

The previous prime is 42920550697. The next prime is 42920550719. The reversal of 42920550709 is 90705502924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24020350225 + 18900200484 = 154985^2 + 137478^2 .

It is a cyclic number.

It is not a de Polignac number, because 42920550709 - 2¹⁷ = 42920419637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42920550719) 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, 1262369122 + ... + 1262369155.

It is an arithmetic number, because the mean of its divisors is an integer number (11361322251).

Almost surely, 2^42920550709 is an apocalyptic number.

It is an amenable number.

42920550709 is a deficient number, since it is larger than the sum of its proper divisors (2524738295).

42920550709 is a wasteful number, since it uses less digits than its factorization.

42920550709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524738294.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 42920550709 in words is "forty-two billion, nine hundred twenty million, five hundred fifty thousand, seven hundred nine".