1091362570489 has 27 divisors (see below), whose sum is σ = 1164166719373. Its totient is φ = 1023020453312.

The previous prime is 1091362570457. The next prime is 1091362570517. The reversal of 1091362570489 is 9840752631901.

It is a happy number.

The square root of 1091362570489 is 1044683.

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 496273754089 + 595088816400 = 704467^2 + 771420^2 .

It is not a de Polignac number, because 1091362570489 - 2⁵ = 1091362570457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091362570409) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1273468149 + ... + 1273469005.

It is a 1-persistent number, because it is pandigital, but 2⋅1091362570489 = 2182725140978 is not.

Almost surely, 2^{1091362570489} is an apocalyptic number.

1091362570489 is the 1044683-rd square number.

1091362570489 is the 522342-nd centered octagonal number.

It is an amenable number.

1091362570489 is a deficient number, since it is larger than the sum of its proper divisors (72804148884).

1091362570489 is an frugal number, since it uses more digits than its factorization.

1091362570489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 1091362570489 in words is "one trillion, ninety-one billion, three hundred sixty-two million, five hundred seventy thousand, four hundred eighty-nine".