27728572785 has 8 divisors (see below), whose sum is σ = 44365716480. Its totient is φ = 14788572144.

The previous prime is 27728572771. The next prime is 27728572841. The reversal of 27728572785 is 58727582772.

It is a happy number.

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

It is not a de Polignac number, because 27728572785 - 2¹³ = 27728564593 is a prime.

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, 924285745 + ... + 924285774.

It is an arithmetic number, because the mean of its divisors is an integer number (5545714560).

Almost surely, 2^27728572785 is an apocalyptic number.

It is an amenable number.

27728572785 is a deficient number, since it is larger than the sum of its proper divisors (16637143695).

27728572785 is a wasteful number, since it uses less digits than its factorization.

27728572785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848571527.

The product of its digits is 30732800, while the sum is 60.

The spelling of 27728572785 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, seven hundred eighty-five".