27728745155 has 8 divisors (see below), whose sum is σ = 33285534000. Its totient is φ = 22175636256.

The previous prime is 27728745097. The next prime is 27728745193. The reversal of 27728745155 is 55154782772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27728745155 - 2¹² = 27728741059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27728745097 and 27728745106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903380 + ... + 933569.

It is an arithmetic number, because the mean of its divisors is an integer number (4160691750).

Almost surely, 2^27728745155 is an apocalyptic number.

27728745155 is a deficient number, since it is larger than the sum of its proper divisors (5556788845).

27728745155 is a wasteful number, since it uses less digits than its factorization.

27728745155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839973.

The product of its digits is 5488000, while the sum is 53.

The spelling of 27728745155 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, one hundred fifty-five".