80492921777 has 2 divisors, whose sum is σ = 80492921778. Its totient is φ = 80492921776.

The previous prime is 80492921749. The next prime is 80492921783. The reversal of 80492921777 is 77712929408.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79928336656 + 564585121 = 282716^2 + 23761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80492921777 is a prime.

It is a super-2 number, since 2×80492921777² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80492921477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40246460888 + 40246460889.

It is an arithmetic number, because the mean of its divisors is an integer number (40246460889).

Almost surely, 2^80492921777 is an apocalyptic number.

It is an amenable number.

80492921777 is a deficient number, since it is larger than the sum of its proper divisors (1).

80492921777 is an equidigital number, since it uses as much as digits as its factorization.

80492921777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 80492921777 in words is "eighty billion, four hundred ninety-two million, nine hundred twenty-one thousand, seven hundred seventy-seven".