1091315673225 has 54 divisors (see below), whose sum is σ = 1972123842650. Its totient is φ = 576882754560.

The previous prime is 1091315673199. The next prime is 1091315673241. The reversal of 1091315673225 is 5223765131901.

1091315673225 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 31 + 567 + 32 + 25 = 666.

It can be written as a sum of positive squares in 9 ways, for example, as 978870805641 + 112444867584 = 989379^2 + 335328^2 .

It is not a de Polignac number, because 1091315673225 - 2⁸ = 1091315672969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2683101 + ... + 3062949.

Almost surely, 2^{1091315673225} is an apocalyptic number.

1091315673225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1091315673225 is a deficient number, since it is larger than the sum of its proper divisors (880808169425).

1091315673225 is a wasteful number, since it uses less digits than its factorization.

1091315673225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380091 (or 379970 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 1091315673225 in words is "one trillion, ninety-one billion, three hundred fifteen million, six hundred seventy-three thousand, two hundred twenty-five".