80781601 has 2 divisors, whose sum is σ = 80781602. Its totient is φ = 80781600.

The previous prime is 80781587. The next prime is 80781607. The reversal of 80781601 is 10618708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41731600 + 39050001 = 6460^2 + 6249^2 .

It is a cyclic number.

It is not a de Polignac number, because 80781601 - 2¹⁷ = 80650529 is a prime.

It is not a weakly prime, because it can be changed into another prime (80781607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40390800 + 40390801.

It is an arithmetic number, because the mean of its divisors is an integer number (40390801).

Almost surely, 2^80781601 is an apocalyptic number.

It is an amenable number.

80781601 is a deficient number, since it is larger than the sum of its proper divisors (1).

80781601 is an equidigital number, since it uses as much as digits as its factorization.

80781601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 80781601 is about 8987.8585324870. The cubic root of 80781601 is about 432.2856496282.

The spelling of 80781601 in words is "eighty million, seven hundred eighty-one thousand, six hundred one".