42144555521 has 8 divisors (see below), whose sum is σ = 43604542464. Its totient is φ = 40690848960.

The previous prime is 42144555511. The next prime is 42144555569. The reversal of 42144555521 is 12555544124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42144555521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42144555511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556441 + ... + 1583286.

It is an arithmetic number, because the mean of its divisors is an integer number (5450567808).

Almost surely, 2^42144555521 is an apocalyptic number.

It is an amenable number.

42144555521 is a deficient number, since it is larger than the sum of its proper divisors (1459986943).

42144555521 is a wasteful number, since it uses less digits than its factorization.

42144555521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140191.

The product of its digits is 160000, while the sum is 38.

The spelling of 42144555521 in words is "forty-two billion, one hundred forty-four million, five hundred fifty-five thousand, five hundred twenty-one".