42547368709 has 4 divisors (see below), whose sum is σ = 42550031916. Its totient is φ = 42544705504.

The previous prime is 42547368707. The next prime is 42547368739. The reversal of 42547368709 is 90786374524.

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 30259646209 + 12287722500 = 173953^2 + 110850^2 .

It is a cyclic number.

It is not a de Polignac number, because 42547368709 - 2¹ = 42547368707 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 42547368709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42547368707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307494 + ... + 1339639.

It is an arithmetic number, because the mean of its divisors is an integer number (10637507979).

Almost surely, 2^42547368709 is an apocalyptic number.

It is an amenable number.

42547368709 is a deficient number, since it is larger than the sum of its proper divisors (2663207).

42547368709 is a wasteful number, since it uses less digits than its factorization.

42547368709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2663206.

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

The spelling of 42547368709 in words is "forty-two billion, five hundred forty-seven million, three hundred sixty-eight thousand, seven hundred nine".