1601802761281 has 2 divisors, whose sum is σ = 1601802761282. Its totient is φ = 1601802761280.

The previous prime is 1601802761269. The next prime is 1601802761303. The reversal of 1601802761281 is 1821672081061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1248842010256 + 352960751025 = 1117516^2 + 594105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601802761281 - 2¹¹ = 1601802759233 is a prime.

It is a super-2 number, since 2×1601802761281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1601802261281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800901380640 + 800901380641.

It is an arithmetic number, because the mean of its divisors is an integer number (800901380641).

Almost surely, 2^{1601802761281} is an apocalyptic number.

It is an amenable number.

1601802761281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601802761281 is an equidigital number, since it uses as much as digits as its factorization.

1601802761281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 1601802761281 in words is "one trillion, six hundred one billion, eight hundred two million, seven hundred sixty-one thousand, two hundred eighty-one".