27780530503 has 4 divisors (see below), whose sum is σ = 30306033288. Its totient is φ = 25255027720.

The previous prime is 27780530471. The next prime is 27780530527. The reversal of 27780530503 is 30503508772.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27780530503 - 2⁵ = 27780530471 is a prime.

It is a super-2 number, since 2×27780530503² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780530563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262751376 + ... + 1262751397.

It is an arithmetic number, because the mean of its divisors is an integer number (7576508322).

Almost surely, 2^27780530503 is an apocalyptic number.

27780530503 is a deficient number, since it is larger than the sum of its proper divisors (2525502785).

27780530503 is a wasteful number, since it uses less digits than its factorization.

27780530503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525502784.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 27780530503 in words is "twenty-seven billion, seven hundred eighty million, five hundred thirty thousand, five hundred three".