142778310061 has 2 divisors, whose sum is σ = 142778310062. Its totient is φ = 142778310060.

The previous prime is 142778310019. The next prime is 142778310083. The reversal of 142778310061 is 160013877241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139689062500 + 3089247561 = 373750^2 + 55581^2 .

It is a cyclic number.

It is not a de Polignac number, because 142778310061 - 2²³ = 142769921453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142778309996 and 142778310023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142778310761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71389155030 + 71389155031.

It is an arithmetic number, because the mean of its divisors is an integer number (71389155031).

Almost surely, 2^142778310061 is an apocalyptic number.

It is an amenable number.

142778310061 is a deficient number, since it is larger than the sum of its proper divisors (1).

142778310061 is an equidigital number, since it uses as much as digits as its factorization.

142778310061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 142778310061 in words is "one hundred forty-two billion, seven hundred seventy-eight million, three hundred ten thousand, sixty-one".