1200664550 has 24 divisors (see below), whose sum is σ = 2253009816. Its totient is φ = 476013440.

The previous prime is 1200664537. The next prime is 1200664601. The reversal of 1200664550 is 554660021.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 100604 + ... + 111903.

It is an arithmetic number, because the mean of its divisors is an integer number (93875409).

Almost surely, 2^1200664550 is an apocalyptic number.

1200664550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200664550 is a deficient number, since it is larger than the sum of its proper divisors (1052345266).

1200664550 is a wasteful number, since it uses less digits than its factorization.

1200664550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212632 (or 212627 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1200664550 is about 34650.6067767940. The cubic root of 1200664550 is about 1062.8546968025.

The spelling of 1200664550 in words is "one billion, two hundred million, six hundred sixty-four thousand, five hundred fifty".