42264439681 has 16 divisors (see below), whose sum is σ = 43016512000. Its totient is φ = 41519858688.

The previous prime is 42264439603. The next prime is 42264439703. The reversal of 42264439681 is 18693446224.

It is a cyclic number.

It is not a de Polignac number, because 42264439681 - 2⁹ = 42264439169 is a prime.

It is a super-2 number, since 2×42264439681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42264431681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8934925 + ... + 8939653.

It is an arithmetic number, because the mean of its divisors is an integer number (2688532000).

Almost surely, 2^42264439681 is an apocalyptic number.

It is an amenable number.

42264439681 is a deficient number, since it is larger than the sum of its proper divisors (752072319).

42264439681 is a wasteful number, since it uses less digits than its factorization.

42264439681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5488.

The product of its digits is 1990656, while the sum is 49.

The spelling of 42264439681 in words is "forty-two billion, two hundred sixty-four million, four hundred thirty-nine thousand, six hundred eighty-one".