42544205947 has 2 divisors, whose sum is σ = 42544205948. Its totient is φ = 42544205946.

The previous prime is 42544205887. The next prime is 42544205953. The reversal of 42544205947 is 74950244524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42544205947 - 2³¹ = 40396722299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42544205897 and 42544205906.

It is not a weakly prime, because it can be changed into another prime (42544202947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272102973 + 21272102974.

It is an arithmetic number, because the mean of its divisors is an integer number (21272102974).

Almost surely, 2^42544205947 is an apocalyptic number.

42544205947 is a deficient number, since it is larger than the sum of its proper divisors (1).

42544205947 is an equidigital number, since it uses as much as digits as its factorization.

42544205947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 46.

The spelling of 42544205947 in words is "forty-two billion, five hundred forty-four million, two hundred five thousand, nine hundred forty-seven".