28180791626 has 8 divisors (see below), whose sum is σ = 45522817284. Its totient is φ = 13006519200.

The previous prime is 28180791623. The next prime is 28180791641. The reversal of 28180791626 is 62619708182.

It can be written as a sum of positive squares in 2 ways, for example, as 27292692025 + 888099601 = 165205^2 + 29801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28180791623) 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 3 ways as a sum of consecutive naturals, for example, 541938275 + ... + 541938326.

Almost surely, 2^28180791626 is an apocalyptic number.

28180791626 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28180791626 is a deficient number, since it is larger than the sum of its proper divisors (17342025658).

28180791626 is a wasteful number, since it uses less digits than its factorization.

28180791626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083876616.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 28180791626 in words is "twenty-eight billion, one hundred eighty million, seven hundred ninety-one thousand, six hundred twenty-six".