42504553673 has 2 divisors, whose sum is σ = 42504553674. Its totient is φ = 42504553672.

The previous prime is 42504553639. The next prime is 42504553681. The reversal of 42504553673 is 37635540524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35284992649 + 7219561024 = 187843^2 + 84968^2 .

It is a cyclic number.

It is not a de Polignac number, because 42504553673 - 2⁸ = 42504553417 is a prime.

It is not a weakly prime, because it can be changed into another prime (42504573673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21252276836 + 21252276837.

It is an arithmetic number, because the mean of its divisors is an integer number (21252276837).

Almost surely, 2^42504553673 is an apocalyptic number.

It is an amenable number.

42504553673 is a deficient number, since it is larger than the sum of its proper divisors (1).

42504553673 is an equidigital number, since it uses as much as digits as its factorization.

42504553673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 44.

The spelling of 42504553673 in words is "forty-two billion, five hundred four million, five hundred fifty-three thousand, six hundred seventy-three".