42161121453 has 16 divisors (see below), whose sum is σ = 62982709056. Its totient is φ = 24861594240.

The previous prime is 42161121449. The next prime is 42161121491. The reversal of 42161121453 is 35412116124.

It is not a de Polignac number, because 42161121453 - 2² = 42161121449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42161121453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42161121403) 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, 17263776 + ... + 17266217.

It is an arithmetic number, because the mean of its divisors is an integer number (3936419316).

Almost surely, 2^42161121453 is an apocalyptic number.

It is an amenable number.

42161121453 is a deficient number, since it is larger than the sum of its proper divisors (20821587603).

42161121453 is a wasteful number, since it uses less digits than its factorization.

42161121453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34530044.

The product of its digits is 5760, while the sum is 30.

Adding to 42161121453 its reverse (35412116124), we get a palindrome (77573237577).

The spelling of 42161121453 in words is "forty-two billion, one hundred sixty-one million, one hundred twenty-one thousand, four hundred fifty-three".