1642301360081 has 2 divisors, whose sum is σ = 1642301360082. Its totient is φ = 1642301360080.

The previous prime is 1642301360047. The next prime is 1642301360143. The reversal of 1642301360081 is 1800631032461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1584285411856 + 58015948225 = 1258684^2 + 240865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642301360081 - 2³⁰ = 1641227618257 is a prime.

It is a super-2 number, since 2×1642301360081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1642301360981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821150680040 + 821150680041.

It is an arithmetic number, because the mean of its divisors is an integer number (821150680041).

Almost surely, 2^{1642301360081} is an apocalyptic number.

It is an amenable number.

1642301360081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642301360081 is an equidigital number, since it uses as much as digits as its factorization.

1642301360081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 1642301360081 in words is "one trillion, six hundred forty-two billion, three hundred one million, three hundred sixty thousand, eighty-one".