27728746485 has 16 divisors (see below), whose sum is σ = 48399266880. Its totient is φ = 13444240640.

The previous prime is 27728746469. The next prime is 27728746511. The reversal of 27728746485 is 58464782772.

It is a happy number.

It is not a de Polignac number, because 27728746485 - 2⁴ = 27728746469 is a prime.

It is a congruent number.

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, 84026340 + ... + 84026669.

It is an arithmetic number, because the mean of its divisors is an integer number (3024954180).

Almost surely, 2^27728746485 is an apocalyptic number.

It is an amenable number.

27728746485 is a deficient number, since it is larger than the sum of its proper divisors (20670520395).

27728746485 is a wasteful number, since it uses less digits than its factorization.

27728746485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168053028.

The product of its digits is 42147840, while the sum is 60.

The spelling of 27728746485 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-six thousand, four hundred eighty-five".