27806400215 has 16 divisors (see below), whose sum is σ = 36414631296. Its totient is φ = 20215322400.

The previous prime is 27806400211. The next prime is 27806400257. The reversal of 27806400215 is 51200460872.

It is not a de Polignac number, because 27806400215 - 2² = 27806400211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27806400211) 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, 57644 + ... + 242766.

It is an arithmetic number, because the mean of its divisors is an integer number (2275914456).

Almost surely, 2^27806400215 is an apocalyptic number.

27806400215 is a deficient number, since it is larger than the sum of its proper divisors (8608231081).

27806400215 is a wasteful number, since it uses less digits than its factorization.

27806400215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187870.

The product of its (nonzero) digits is 26880, while the sum is 35.

The spelling of 27806400215 in words is "twenty-seven billion, eight hundred six million, four hundred thousand, two hundred fifteen".