27520830787 has 4 divisors (see below), whose sum is σ = 27523075320. Its totient is φ = 27518586256.

The previous prime is 27520830767. The next prime is 27520830797. The reversal of 27520830787 is 78703802572.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27520830787 is a prime.

It is a super-2 number, since 2×27520830787² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27520830787.

It is not an unprimeable number, because it can be changed into a prime (27520830737) 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, 1103773 + ... + 1128430.

It is an arithmetic number, because the mean of its divisors is an integer number (6880768830).

Almost surely, 2^27520830787 is an apocalyptic number.

27520830787 is a deficient number, since it is larger than the sum of its proper divisors (2244533).

27520830787 is a wasteful number, since it uses less digits than its factorization.

27520830787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244532.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 27520830787 in words is "twenty-seven billion, five hundred twenty million, eight hundred thirty thousand, seven hundred eighty-seven".