42459239561 has 16 divisors (see below), whose sum is σ = 46667275200. Its totient is φ = 38474468928.

The previous prime is 42459239509. The next prime is 42459239573. The reversal of 42459239561 is 16593295424.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42459239561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42459239261) 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, 301130 + ... + 419043.

It is an arithmetic number, because the mean of its divisors is an integer number (2916704700).

Almost surely, 2^42459239561 is an apocalyptic number.

It is an amenable number.

42459239561 is a deficient number, since it is larger than the sum of its proper divisors (4208035639).

42459239561 is a wasteful number, since it uses less digits than its factorization.

42459239561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720328.

The product of its digits is 2332800, while the sum is 50.

The spelling of 42459239561 in words is "forty-two billion, four hundred fifty-nine million, two hundred thirty-nine thousand, five hundred sixty-one".