1125656550 has 72 divisors (see below), whose sum is σ = 3106046736. Its totient is φ = 292057920.

The previous prime is 1125656473. The next prime is 1125656551. The reversal of 1125656550 is 556565211.

1125656550 is a `hidden beast` number, since 1 + 1 + 2 + 56 + 56 + 550 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125656551) 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, 17154 + ... + 50453.

It is an arithmetic number, because the mean of its divisors is an integer number (43139538).

Almost surely, 2^1125656550 is an apocalyptic number.

1125656550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125656550 is an abundant number, since it is smaller than the sum of its proper divisors (1980390186).

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

1125656550 is a wasteful number, since it uses less digits than its factorization.

1125656550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67662 (or 67654 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 1125656550 is about 33550.8055044883. The cubic root of 1125656550 is about 1040.2441950000.

The spelling of 1125656550 in words is "one billion, one hundred twenty-five million, six hundred fifty-six thousand, five hundred fifty".