80813278181 has 2 divisors, whose sum is σ = 80813278182. Its totient is φ = 80813278180.

The previous prime is 80813278153. The next prime is 80813278261. The reversal of 80813278181 is 18187231808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44169747556 + 36643530625 = 210166^2 + 191425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80813278181 is a prime.

It is a super-2 number, since 2×80813278181² (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 (80813278081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40406639090 + 40406639091.

It is an arithmetic number, because the mean of its divisors is an integer number (40406639091).

Almost surely, 2^80813278181 is an apocalyptic number.

It is an amenable number.

80813278181 is a deficient number, since it is larger than the sum of its proper divisors (1).

80813278181 is an equidigital number, since it uses as much as digits as its factorization.

80813278181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 47.

The spelling of 80813278181 in words is "eighty billion, eight hundred thirteen million, two hundred seventy-eight thousand, one hundred eighty-one".