7027636561 has 9 divisors (see below), whose sum is σ = 7725605979. Its totient is φ = 6387922200.

The previous prime is 7027636547. The next prime is 7027636573. The reversal of 7027636561 is 1656367207.

The square root of 7027636561 is 83831.

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

It can be written as a sum of positive squares in only one way, i.e., 6222212161 + 805424400 = 78881^2 + 28380^2 .

It is not a de Polignac number, because 7027636561 - 2⁷ = 7027636433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7027639561) 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, 918331 + ... + 925951.

Almost surely, 2^7027636561 is an apocalyptic number.

7027636561 is the 83831-st square number.

7027636561 is the 41916-th centered octagonal number.

It is an amenable number.

7027636561 is a deficient number, since it is larger than the sum of its proper divisors (697969418).

7027636561 is an frugal number, since it uses more digits than its factorization.

7027636561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15264 (or 7632 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 43.

The cubic root of 7027636561 is about 1915.4453455034.

The spelling of 7027636561 in words is "seven billion, twenty-seven million, six hundred thirty-six thousand, five hundred sixty-one".