1091260193956 has 9 divisors (see below), whose sum is σ = 1909708995649. Its totient is φ = 545629052344.

The previous prime is 1091260193923. The next prime is 1091260194001. The reversal of 1091260193956 is 6593910621901.

It is a happy number.

The square root of 1091260193956 is 1044634.

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., 201286822500 + 889973371456 = 448650^2 + 943384^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1828110 + ... + 2350426.

Almost surely, 2^{1091260193956} is an apocalyptic number.

1091260193956 is the 1044634-th square number.

It is an amenable number.

1091260193956 is a deficient number, since it is larger than the sum of its proper divisors (818448801693).

1091260193956 is an frugal number, since it uses more digits than its factorization.

1091260193956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044638 (or 522319 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 52.

The spelling of 1091260193956 in words is "one trillion, ninety-one billion, two hundred sixty million, one hundred ninety-three thousand, nine hundred fifty-six".