180778877081 has 16 divisors (see below), whose sum is σ = 208980233280. Its totient is φ = 154554055680.

The previous prime is 180778877063. The next prime is 180778877099.

180778877081 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (180778877063) and next prime (180778877099).

It is not a de Polignac number, because 180778877081 - 2²⁶ = 180711768217 is a prime.

It is a super-2 number, since 2×180778877081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180778877051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148496 + ... + 619361.

It is an arithmetic number, because the mean of its divisors is an integer number (13061264580).

Almost surely, 2^180778877081 is an apocalyptic number.

180778877081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

180778877081 is a deficient number, since it is larger than the sum of its proper divisors (28201356199).

180778877081 is a wasteful number, since it uses less digits than its factorization.

180778877081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769144.

The product of its (nonzero) digits is 9834496, while the sum is 62.

The spelling of 180778877081 in words is "one hundred eighty billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, eighty-one".