1199664522 has 96 divisors (see below), whose sum is σ = 3138894720. Its totient is φ = 323481600.

The previous prime is 1199664509. The next prime is 1199664527. The reversal of 1199664522 is 2254669911.

1199664522 is a `hidden beast` number, since 1 + 199 + 6 + 6 + 452 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1199664527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 748522 + ... + 750122.

It is an arithmetic number, because the mean of its divisors is an integer number (32696820).

Almost surely, 2^1199664522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1199664522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1569447360).

1199664522 is an abundant number, since it is smaller than the sum of its proper divisors (1939230198).

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

1199664522 is a wasteful number, since it uses less digits than its factorization.

1199664522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948 (or 1945 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1199664522 is about 34636.1736050621. The cubic root of 1199664522 is about 1062.5595325720.

The spelling of 1199664522 in words is "one billion, one hundred ninety-nine million, six hundred sixty-four thousand, five hundred twenty-two".