27728572773 has 64 divisors (see below), whose sum is σ = 43586887680. Its totient is φ = 15498086400.

The previous prime is 27728572771. The next prime is 27728572841. The reversal of 27728572773 is 37727582772.

It is not a de Polignac number, because 27728572773 - 2¹ = 27728572771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728572771) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15603261 + ... + 15605037.

It is an arithmetic number, because the mean of its divisors is an integer number (681045120).

Almost surely, 2^27728572773 is an apocalyptic number.

It is an amenable number.

27728572773 is a deficient number, since it is larger than the sum of its proper divisors (15858314907).

27728572773 is a wasteful number, since it uses less digits than its factorization.

27728572773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458.

The product of its digits is 16134720, while the sum is 57.

Subtracting 27728572773 from its reverse (37727582772), we obtain a palindrome (9999009999).

The spelling of 27728572773 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred seventy-two thousand, seven hundred seventy-three".