42743658449 has 2 divisors, whose sum is σ = 42743658450. Its totient is φ = 42743658448.

The previous prime is 42743658443. The next prime is 42743658497. The reversal of 42743658449 is 94485634724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25207277824 + 17536380625 = 158768^2 + 132425^2 .

It is a cyclic number.

It is not a de Polignac number, because 42743658449 - 2²⁴ = 42726881233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42743658394 and 42743658403.

It is not a weakly prime, because it can be changed into another prime (42743658443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21371829224 + 21371829225.

It is an arithmetic number, because the mean of its divisors is an integer number (21371829225).

Almost surely, 2^42743658449 is an apocalyptic number.

It is an amenable number.

42743658449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42743658449 is an equidigital number, since it uses as much as digits as its factorization.

42743658449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 56.

The spelling of 42743658449 in words is "forty-two billion, seven hundred forty-three million, six hundred fifty-eight thousand, four hundred forty-nine".