1165570550 has 48 divisors (see below), whose sum is σ = 2292603264. Its totient is φ = 440160000.

The previous prime is 1165570543. The next prime is 1165570573. The reversal of 1165570550 is 550755611.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165570550.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54380 + ... + 72720.

It is an arithmetic number, because the mean of its divisors is an integer number (47762568).

Almost surely, 2^1165570550 is an apocalyptic number.

1165570550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165570550 is a deficient number, since it is larger than the sum of its proper divisors (1127032714).

1165570550 is a wasteful number, since it uses less digits than its factorization.

1165570550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425 (or 18420 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 35.

The square root of 1165570550 is about 34140.4532776002. The cubic root of 1165570550 is about 1052.3968073987.

The spelling of 1165570550 in words is "one billion, one hundred sixty-five million, five hundred seventy thousand, five hundred fifty".