42144420361 has 4 divisors (see below), whose sum is σ = 43503917824. Its totient is φ = 40784922900.

The previous prime is 42144420359. The next prime is 42144420403. The reversal of 42144420361 is 16302444124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42144420361 - 2¹ = 42144420359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1359497431 = 42144420361 / (4 + 2 + 1 + 4 + 4 + 4 + 2 + 0 + 3 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42144420341) 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 3 ways as a sum of consecutive naturals, for example, 679748685 + ... + 679748746.

It is an arithmetic number, because the mean of its divisors is an integer number (10875979456).

Almost surely, 2^42144420361 is an apocalyptic number.

It is an amenable number.

42144420361 is a deficient number, since it is larger than the sum of its proper divisors (1359497463).

42144420361 is a wasteful number, since it uses less digits than its factorization.

42144420361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359497462.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 42144420361 its reverse (16302444124), we get a palindrome (58446864485).

The spelling of 42144420361 in words is "forty-two billion, one hundred forty-four million, four hundred twenty thousand, three hundred sixty-one".