7289087428561 has 9 divisors (see below), whose sum is σ = 7362246577179. Its totient is φ = 7216648263000.

The previous prime is 7289087428453. The next prime is 7289087428663. The reversal of 7289087428561 is 1658247809827.

The square root of 7289087428561 is 2699831.

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., 7003268884161 + 285818544400 = 2646369^2 + 534620^2 .

It is not a de Polignac number, because 7289087428561 - 2²³ = 7289079039953 is a prime.

It is a super-2 number, since 2×7289087428561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7289087428061) 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, 272669566 + ... + 272696296.

Almost surely, 2^{7289087428561} is an apocalyptic number.

7289087428561 is the 2699831-st square number.

7289087428561 is the 1349916-th centered octagonal number.

It is an amenable number.

7289087428561 is a deficient number, since it is larger than the sum of its proper divisors (73159148618).

7289087428561 is an frugal number, since it uses more digits than its factorization.

7289087428561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53664 (or 26832 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 67.

The spelling of 7289087428561 in words is "seven trillion, two hundred eighty-nine billion, eighty-seven million, four hundred twenty-eight thousand, five hundred sixty-one".