142637819321 has 2 divisors, whose sum is σ = 142637819322. Its totient is φ = 142637819320.

The previous prime is 142637819281. The next prime is 142637819339. The reversal of 142637819321 is 123918736241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93369358096 + 49268461225 = 305564^2 + 221965^2 .

It is a cyclic number.

It is not a de Polignac number, because 142637819321 - 2¹⁸ = 142637557177 is a prime.

It is not a weakly prime, because it can be changed into another prime (142637815321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71318909660 + 71318909661.

It is an arithmetic number, because the mean of its divisors is an integer number (71318909661).

Almost surely, 2^142637819321 is an apocalyptic number.

It is an amenable number.

142637819321 is a deficient number, since it is larger than the sum of its proper divisors (1).

142637819321 is an equidigital number, since it uses as much as digits as its factorization.

142637819321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 142637819321 in words is "one hundred forty-two billion, six hundred thirty-seven million, eight hundred nineteen thousand, three hundred twenty-one".