80655571 has 2 divisors, whose sum is σ = 80655572. Its totient is φ = 80655570.

The previous prime is 80655563. The next prime is 80655611. The reversal of 80655571 is 17555608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80655571 - 2³ = 80655563 is a prime.

It is a super-2 number, since 2×80655571² = 13010642266672082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80655571.

It is not a weakly prime, because it can be changed into another prime (80655371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40327785 + 40327786.

It is an arithmetic number, because the mean of its divisors is an integer number (40327786).

Almost surely, 2^80655571 is an apocalyptic number.

80655571 is a deficient number, since it is larger than the sum of its proper divisors (1).

80655571 is an equidigital number, since it uses as much as digits as its factorization.

80655571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 80655571 is about 8980.8446707423. The cubic root of 80655571 is about 432.0607249885.

Adding to 80655571 its sum of digits (37), we get a palindrome (80655608).

The spelling of 80655571 in words is "eighty million, six hundred fifty-five thousand, five hundred seventy-one".