42602172409 has 4 divisors (see below), whose sum is σ = 43300568740. Its totient is φ = 41903776080.

The previous prime is 42602172391. The next prime is 42602172463. The reversal of 42602172409 is 90427120624.

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 509495184 + 42092677225 = 22572^2 + 205165^2 .

It is a cyclic number.

It is not a de Polignac number, because 42602172409 - 2⁹ = 42602171897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42602152409) 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, 349198074 + ... + 349198195.

It is an arithmetic number, because the mean of its divisors is an integer number (10825142185).

Almost surely, 2^42602172409 is an apocalyptic number.

It is an amenable number.

42602172409 is a deficient number, since it is larger than the sum of its proper divisors (698396331).

42602172409 is an equidigital number, since it uses as much as digits as its factorization.

42602172409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698396330.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 42602172409 in words is "forty-two billion, six hundred two million, one hundred seventy-two thousand, four hundred nine".