27880513387 has 16 divisors (see below), whose sum is σ = 28409603040. Its totient is φ = 27357120000.

The previous prime is 27880513373. The next prime is 27880513403. The reversal of 27880513387 is 78331508872.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27880513387 - 2¹⁵ = 27880480619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27880513337) 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, 9839923 + ... + 9842755.

It is an arithmetic number, because the mean of its divisors is an integer number (1775600190).

Almost surely, 2^27880513387 is an apocalyptic number.

27880513387 is a deficient number, since it is larger than the sum of its proper divisors (529089653).

27880513387 is a wasteful number, since it uses less digits than its factorization.

27880513387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774.

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 27880513387 in words is "twenty-seven billion, eight hundred eighty million, five hundred thirteen thousand, three hundred eighty-seven".