27566957089 has 9 divisors (see below), whose sum is σ = 32069036817. Its totient is φ = 23627824164.

The previous prime is 27566957051. The next prime is 27566957137. The reversal of 27566957089 is 98075966572.

The square root of 27566957089 is 166033.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 27566957089 - 2⁷ = 27566956961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27566957089.

It is not an unprimeable number, because it can be changed into a prime (27566955089) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1150372 + ... + 1174090.

It is an arithmetic number, because the mean of its divisors is an integer number (3563226313).

Almost surely, 2^27566957089 is an apocalyptic number.

27566957089 is the 166033-rd square number.

27566957089 is the 83017-th centered octagonal number.

It is an amenable number.

27566957089 is a deficient number, since it is larger than the sum of its proper divisors (4502079728).

27566957089 is an frugal number, since it uses more digits than its factorization.

27566957089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47452 (or 23726 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 64.

Multiplying 27566957089 by its sum of digits (64), we get a square (1764285253696 = 1328264²).

The spelling of 27566957089 in words is "twenty-seven billion, five hundred sixty-six million, nine hundred fifty-seven thousand, eighty-nine".