80618368877 has 2 divisors, whose sum is σ = 80618368878. Its totient is φ = 80618368876.

The previous prime is 80618368849. The next prime is 80618368907. The reversal of 80618368877 is 77886381608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80142212836 + 476156041 = 283094^2 + 21821^2 .

It is a cyclic number.

It is not a de Polignac number, because 80618368877 - 2¹² = 80618364781 is a prime.

It is a super-2 number, since 2×80618368877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80618368577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40309184438 + 40309184439.

It is an arithmetic number, because the mean of its divisors is an integer number (40309184439).

Almost surely, 2^80618368877 is an apocalyptic number.

It is an amenable number.

80618368877 is a deficient number, since it is larger than the sum of its proper divisors (1).

80618368877 is an equidigital number, since it uses as much as digits as its factorization.

80618368877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21676032, while the sum is 62.

The spelling of 80618368877 in words is "eighty billion, six hundred eighteen million, three hundred sixty-eight thousand, eight hundred seventy-seven".