81282577601 has 2 divisors, whose sum is σ = 81282577602. Its totient is φ = 81282577600.

The previous prime is 81282577517. The next prime is 81282577631. The reversal of 81282577601 is 10677528218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80089566001 + 1193011600 = 283001^2 + 34540^2 .

It is a cyclic number.

It is not a de Polignac number, because 81282577601 - 2¹⁰ = 81282576577 is a prime.

It is not a weakly prime, because it can be changed into another prime (81282577631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40641288800 + 40641288801.

It is an arithmetic number, because the mean of its divisors is an integer number (40641288801).

Almost surely, 2^81282577601 is an apocalyptic number.

It is an amenable number.

81282577601 is a deficient number, since it is larger than the sum of its proper divisors (1).

81282577601 is an equidigital number, since it uses as much as digits as its factorization.

81282577601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 81282577601 in words is "eighty-one billion, two hundred eighty-two million, five hundred seventy-seven thousand, six hundred one".