42443255016561 has 12 divisors (see below), whose sum is σ = 65830354719792. Its totient is φ = 24253288580808.

The previous prime is 42443255016523. The next prime is 42443255016563. The reversal of 42443255016561 is 16561055234424.

It is not a de Polignac number, because 42443255016561 - 2⁷ = 42443255016433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42443255016561.

It is not an unprimeable number, because it can be changed into a prime (42443255016563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144364812835 + ... + 144364813128.

It is an arithmetic number, because the mean of its divisors is an integer number (5485862893316).

Almost surely, 2^{42443255016561} is an apocalyptic number.

It is an amenable number.

42443255016561 is a deficient number, since it is larger than the sum of its proper divisors (23387099703231).

42443255016561 is a wasteful number, since it uses less digits than its factorization.

42443255016561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288729625980 (or 288729625973 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 42443255016561 in words is "forty-two trillion, four hundred forty-three billion, two hundred fifty-five million, sixteen thousand, five hundred sixty-one".