1125165663 has 12 divisors (see below), whose sum is σ = 1636933480. Its totient is φ = 744713136.

The previous prime is 1125165653. The next prime is 1125165683. The reversal of 1125165663 is 3665615211.

It is not a de Polignac number, because 1125165663 - 2⁵ = 1125165631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125165653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448456 + ... + 450957.

Almost surely, 2^1125165663 is an apocalyptic number.

1125165663 is a deficient number, since it is larger than the sum of its proper divisors (511767817).

1125165663 is a wasteful number, since it uses less digits than its factorization.

1125165663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899558 (or 899555 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1125165663 is about 33543.4891297849. The cubic root of 1125165663 is about 1040.0929598242.

The spelling of 1125165663 in words is "one billion, one hundred twenty-five million, one hundred sixty-five thousand, six hundred sixty-three".