1125845170809 has 16 divisors (see below), whose sum is σ = 1507101872640. Its totient is φ = 747580458240.

The previous prime is 1125845170799. The next prime is 1125845170907. The reversal of 1125845170809 is 9080715485211.

It is a happy number.

It is not a de Polignac number, because 1125845170809 - 2⁵ = 1125845170777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125845150809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440047 + ... + 1563755.

It is an arithmetic number, because the mean of its divisors is an integer number (94193867040).

Almost surely, 2^{1125845170809} is an apocalyptic number.

It is an amenable number.

1125845170809 is a deficient number, since it is larger than the sum of its proper divisors (381256701831).

1125845170809 is a wasteful number, since it uses less digits than its factorization.

1125845170809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125040.

The product of its (nonzero) digits is 806400, while the sum is 51.

The spelling of 1125845170809 in words is "one trillion, one hundred twenty-five billion, eight hundred forty-five million, one hundred seventy thousand, eight hundred nine".