1125646650 has 72 divisors (see below), whose sum is σ = 3035267040. Its totient is φ = 299077920.

The previous prime is 1125646649. The next prime is 1125646651. The reversal of 1125646650 is 566465211.

1125646650 is a `hidden beast` number, since 1 + 1 + 2 + 5 + 646 + 6 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1125646649) and next prime (1125646651).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1125646651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 122931 + ... + 131769.

Almost surely, 2^1125646650 is an apocalyptic number.

1125646650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125646650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517633520).

1125646650 is an abundant number, since it is smaller than the sum of its proper divisors (1909620390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1125646650 is a wasteful number, since it uses less digits than its factorization.

1125646650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140 (or 9132 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1125646650 is about 33550.6579667225. The cubic root of 1125646650 is about 1040.2411453879.

The spelling of 1125646650 in words is "one billion, one hundred twenty-five million, six hundred forty-six thousand, six hundred fifty".