27606721155 has 16 divisors (see below), whose sum is σ = 47568504480. Its totient is φ = 13591001088.

The previous prime is 27606721147. The next prime is 27606721169. The reversal of 27606721155 is 55112760672.

It is a happy number.

It is not a de Polignac number, because 27606721155 - 2³ = 27606721147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70786270 + ... + 70786659.

It is an arithmetic number, because the mean of its divisors is an integer number (2973031530).

Almost surely, 2^27606721155 is an apocalyptic number.

27606721155 is a deficient number, since it is larger than the sum of its proper divisors (19961783325).

27606721155 is a wasteful number, since it uses less digits than its factorization.

27606721155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141572950.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 27606721155 in words is "twenty-seven billion, six hundred six million, seven hundred twenty-one thousand, one hundred fifty-five".