1125618550 has 24 divisors (see below), whose sum is σ = 2392744176. Its totient is φ = 385926240.

The previous prime is 1125618541. The next prime is 1125618553. The reversal of 1125618550 is 558165211.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125618553) 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, 1607677 + ... + 1608376.

It is an arithmetic number, because the mean of its divisors is an integer number (99697674).

Almost surely, 2^1125618550 is an apocalyptic number.

1125618550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125618550 is an abundant number, since it is smaller than the sum of its proper divisors (1267125626).

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

1125618550 is a wasteful number, since it uses less digits than its factorization.

1125618550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216072 (or 3216067 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

The square root of 1125618550 is about 33550.2391943783. The cubic root of 1125618550 is about 1040.2324893206.

The spelling of 1125618550 in words is "one billion, one hundred twenty-five million, six hundred eighteen thousand, five hundred fifty".