42489107633281 has 4 divisors (see below), whose sum is σ = 42489124125652. Its totient is φ = 42489091140912.

The previous prime is 42489107633263. The next prime is 42489107633321. The reversal of 42489107633281 is 18233670198424.

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 6954871309681 + 35534236323600 = 2637209^2 + 5961060^2 .

It is a cyclic number.

It is not a de Polignac number, because 42489107633281 - 2²³ = 42489099244673 is a prime.

It is a super-2 number, since 2×42489107633281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42489107633261) 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, 3453090 + ... + 9843883.

It is an arithmetic number, because the mean of its divisors is an integer number (10622281031413).

Almost surely, 2^{42489107633281} is an apocalyptic number.

It is an amenable number.

42489107633281 is a deficient number, since it is larger than the sum of its proper divisors (16492371).

42489107633281 is a wasteful number, since it uses less digits than its factorization.

42489107633281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16492370.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 42489107633281 in words is "forty-two trillion, four hundred eighty-nine billion, one hundred seven million, six hundred thirty-three thousand, two hundred eighty-one".