80983499777 has 32 divisors (see below), whose sum is σ = 88349657760. Its totient is φ = 73946234880.

The previous prime is 80983499749. The next prime is 80983499809. The reversal of 80983499777 is 77799438908.

It is a Cunningham number, because it is equal to 284576²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 44618535361 + 36364964416 = 211231^2 + 190696^2 .

It is a cyclic number.

It is not a de Polignac number, because 80983499777 - 2¹⁰ = 80983498753 is a prime.

It is a super-2 number, since 2×80983499777² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80983499777.

It is not an unprimeable number, because it can be changed into a prime (80983499477) 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 in 31 ways as a sum of consecutive naturals, for example, 33897299 + ... + 33899687.

It is an arithmetic number, because the mean of its divisors is an integer number (2760926805).

Almost surely, 2^80983499777 is an apocalyptic number.

It is an amenable number.

80983499777 is a deficient number, since it is larger than the sum of its proper divisors (7366157983).

80983499777 is a wasteful number, since it uses less digits than its factorization.

80983499777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its (nonzero) digits is 192036096, while the sum is 71.

The spelling of 80983499777 in words is "eighty billion, nine hundred eighty-three million, four hundred ninety-nine thousand, seven hundred seventy-seven".