1097501378689 has 9 divisors (see below), whose sum is σ = 1099938291753. Its totient is φ = 1095069859632.

The previous prime is 1097501378647. The next prime is 1097501378707. The reversal of 1097501378689 is 9868731057901.

The square root of 1097501378689 is 1047617.

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

It can be written as a sum of positive squares in 4 ways, for example, as 840054737025 + 257446641664 = 916545^2 + 507392^2 .

It is not a de Polignac number, because 1097501378689 - 2²⁷ = 1097367160961 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 1097501378689.

It is not an unprimeable number, because it can be changed into a prime (1097501378609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 642188367 + ... + 642190075.

Almost surely, 2^{1097501378689} is an apocalyptic number.

1097501378689 is the 1047617-th square number.

1097501378689 is the 523809-th centered octagonal number.

It is an amenable number.

1097501378689 is a deficient number, since it is larger than the sum of its proper divisors (2436913064).

1097501378689 is an frugal number, since it uses more digits than its factorization.

1097501378689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644 (or 2322 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 64.

Multiplying 1097501378689 by its sum of digits (64), we get a square (70240088236096 = 8380936²).

The spelling of 1097501378689 in words is "one trillion, ninety-seven billion, five hundred one million, three hundred seventy-eight thousand, six hundred eighty-nine".