1201564650 has 288 divisors, whose sum is σ = 3659765760. Its totient is φ = 258336000.

The previous prime is 1201564601. The next prime is 1201564673. The reversal of 1201564650 is 564651021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8644281 + ... + 8644419.

It is an arithmetic number, because the mean of its divisors is an integer number (12707520).

Almost surely, 2^1201564650 is an apocalyptic number.

1201564650 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 1201564650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829882880).

1201564650 is an abundant number, since it is smaller than the sum of its proper divisors (2458201110).

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

1201564650 is a wasteful number, since it uses less digits than its factorization.

1201564650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1201564650 is about 34663.5925720344. The cubic root of 1201564650 is about 1063.1202265735.

The spelling of 1201564650 in words is "one billion, two hundred one million, five hundred sixty-four thousand, six hundred fifty".