42129583777 has 2 divisors, whose sum is σ = 42129583778. Its totient is φ = 42129583776.

The previous prime is 42129583739. The next prime is 42129583789. The reversal of 42129583777 is 77738592124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34132932001 + 7996651776 = 184751^2 + 89424^2 .

It is a cyclic number.

It is not a de Polignac number, because 42129583777 - 2¹¹ = 42129581729 is a prime.

It is not a weakly prime, because it can be changed into another prime (42129580777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064791888 + 21064791889.

It is an arithmetic number, because the mean of its divisors is an integer number (21064791889).

Almost surely, 2^42129583777 is an apocalyptic number.

It is an amenable number.

42129583777 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129583777 is an equidigital number, since it uses as much as digits as its factorization.

42129583777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 55.

The spelling of 42129583777 in words is "forty-two billion, one hundred twenty-nine million, five hundred eighty-three thousand, seven hundred seventy-seven".