42105562777 has 2 divisors, whose sum is σ = 42105562778. Its totient is φ = 42105562776.

The previous prime is 42105562721. The next prime is 42105562783. The reversal of 42105562777 is 77726550124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33857472016 + 8248090761 = 184004^2 + 90819^2 .

It is a cyclic number.

It is not a de Polignac number, because 42105562777 - 2⁷ = 42105562649 is a prime.

It is not a weakly prime, because it can be changed into another prime (42105562717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21052781388 + 21052781389.

It is an arithmetic number, because the mean of its divisors is an integer number (21052781389).

Almost surely, 2^42105562777 is an apocalyptic number.

It is an amenable number.

42105562777 is a deficient number, since it is larger than the sum of its proper divisors (1).

42105562777 is an equidigital number, since it uses as much as digits as its factorization.

42105562777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 42105562777 in words is "forty-two billion, one hundred five million, five hundred sixty-two thousand, seven hundred seventy-seven".