28180518331 has 12 divisors (see below), whose sum is σ = 32815235160. Its totient is φ = 24129813120.

The previous prime is 28180518323. The next prime is 28180518343. The reversal of 28180518331 is 13381508182.

It is not a de Polignac number, because 28180518331 - 2³ = 28180518323 is a prime.

It is a super-2 number, since 2×28180518331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28180818331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248566 + ... + 343723.

It is an arithmetic number, because the mean of its divisors is an integer number (2734602930).

Almost surely, 2^28180518331 is an apocalyptic number.

28180518331 is a deficient number, since it is larger than the sum of its proper divisors (4634716829).

28180518331 is an equidigital number, since it uses as much as digits as its factorization.

28180518331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593274 (or 593267 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The spelling of 28180518331 in words is "twenty-eight billion, one hundred eighty million, five hundred eighteen thousand, three hundred thirty-one".