42144346505 has 4 divisors (see below), whose sum is σ = 50573215812. Its totient is φ = 33715477200.

The previous prime is 42144346471. The next prime is 42144346511. The reversal of 42144346505 is 50564344124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16438316944 + 25706029561 = 128212^2 + 160331^2 .

It is not a de Polignac number, because 42144346505 - 2⁶ = 42144346441 is a prime.

It is a super-2 number, since 2×42144346505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4214434646 + ... + 4214434655.

It is an arithmetic number, because the mean of its divisors is an integer number (12643303953).

Almost surely, 2^42144346505 is an apocalyptic number.

It is an amenable number.

42144346505 is a deficient number, since it is larger than the sum of its proper divisors (8428869307).

42144346505 is an equidigital number, since it uses as much as digits as its factorization.

42144346505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8428869306.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 42144346505 in words is "forty-two billion, one hundred forty-four million, three hundred forty-six thousand, five hundred five".