80447854657481 has 2 divisors, whose sum is σ = 80447854657482. Its totient is φ = 80447854657480.

The previous prime is 80447854657463. The next prime is 80447854657627. The reversal of 80447854657481 is 18475645874408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64945208381881 + 15502646275600 = 8058859^2 + 3937340^2 .

It is a cyclic number.

It is not a de Polignac number, because 80447854657481 - 2³⁴ = 80430674788297 is a prime.

It is a super-2 number, since 2×80447854657481² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80447854857481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40223927328740 + 40223927328741.

It is an arithmetic number, because the mean of its divisors is an integer number (40223927328741).

Almost surely, 2^{80447854657481} is an apocalyptic number.

It is an amenable number.

80447854657481 is a deficient number, since it is larger than the sum of its proper divisors (1).

80447854657481 is an equidigital number, since it uses as much as digits as its factorization.

80447854657481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 963379200, while the sum is 71.

The spelling of 80447854657481 in words is "eighty trillion, four hundred forty-seven billion, eight hundred fifty-four million, six hundred fifty-seven thousand, four hundred eighty-one".