42145333561 has 8 divisors (see below), whose sum is σ = 44054771904. Its totient is φ = 40242314640.

The previous prime is 42145333541. The next prime is 42145333577. The reversal of 42145333561 is 16533354124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42145333561 - 2²³ = 42136944953 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 42145333561.

It is not an unprimeable number, because it can be changed into a prime (42145333541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591426 + ... + 1617691.

It is an arithmetic number, because the mean of its divisors is an integer number (5506846488).

Almost surely, 2^42145333561 is an apocalyptic number.

It is an amenable number.

42145333561 is a deficient number, since it is larger than the sum of its proper divisors (1909438343).

42145333561 is a wasteful number, since it uses less digits than its factorization.

42145333561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209711.

The product of its digits is 129600, while the sum is 37.

Adding to 42145333561 its reverse (16533354124), we get a palindrome (58678687685).

The spelling of 42145333561 in words is "forty-two billion, one hundred forty-five million, three hundred thirty-three thousand, five hundred sixty-one".