1791126145 has 4 divisors (see below), whose sum is σ = 2149351380. Its totient is φ = 1432900912.

The previous prime is 1791126133. The next prime is 1791126187. The reversal of 1791126145 is 5416211971.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244985104 + 1546141041 = 15652^2 + 39321^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791126145 - 2²⁵ = 1757571713 is a prime.

It is a super-2 number, since 2×1791126145² = 6416265734605122050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179112610 + ... + 179112619.

It is an arithmetic number, because the mean of its divisors is an integer number (537337845).

Almost surely, 2^1791126145 is an apocalyptic number.

It is an amenable number.

1791126145 is a deficient number, since it is larger than the sum of its proper divisors (358225235).

1791126145 is an equidigital number, since it uses as much as digits as its factorization.

1791126145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358225234.

The product of its digits is 15120, while the sum is 37.

The square root of 1791126145 is about 42321.6982764161. The cubic root of 1791126145 is about 1214.4381207518.

The spelling of 1791126145 in words is "one billion, seven hundred ninety-one million, one hundred twenty-six thousand, one hundred forty-five".