42718157771 has 2 divisors, whose sum is σ = 42718157772. Its totient is φ = 42718157770.

The previous prime is 42718157749. The next prime is 42718157777. The reversal of 42718157771 is 17775181724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42718157771 is a prime.

It is not a weakly prime, because it can be changed into another prime (42718157777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21359078885 + 21359078886.

It is an arithmetic number, because the mean of its divisors is an integer number (21359078886).

Almost surely, 2^42718157771 is an apocalyptic number.

42718157771 is a deficient number, since it is larger than the sum of its proper divisors (1).

42718157771 is an equidigital number, since it uses as much as digits as its factorization.

42718157771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768320, while the sum is 50.

The spelling of 42718157771 in words is "forty-two billion, seven hundred eighteen million, one hundred fifty-seven thousand, seven hundred seventy-one".